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Areta JL, Meehan E, Howe G, Redman LM. Energetics of a World-Tour Female Road Cyclist During a Multistage Race (Tour de France Femmes). Int J Sport Nutr Exerc Metab 2024; 34:253-257. [PMID: 38796175 DOI: 10.1123/ijsnem.2023-0275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 03/21/2024] [Accepted: 04/02/2024] [Indexed: 05/28/2024]
Abstract
Despite the increased popularity of female elite road cycling, research to inform the fueling requirements of these endurance athletes is lacking. In this case study, we report for the first time the energetics of a female world-tour cyclist competing in the 2023 Tour de France Femmes, an 8-day race of the Union Cycliste Internationale. The 29-year-old athlete presented with oligomenorrhea and low T3 before the race. Total daily energy expenditure assessed with the doubly labeled water technique was 7,572 kcal/day (∼4.3 physical activity levels), among the highest reported in the literature to date for a female. Crank-based mean maximal power was consistent with female world-tour cyclists (5 min, mean 342 W, 4.8 W/kg; 20 min 289 W, 4.1 W/kg). The average daily energy intake measured with the remote food photography method (Stage Days 1-7) was 5,246 kcal and carbohydrate intake was 13.7 g/kg (range 9.7-15.9 g/kg), and 84 g/hr during stages, and an average fat intake of 15% of daily energy intake. An estimated 2,326 kcal/day energy deficit was evidenced in a 2.2 kg decrease in body mass. Notwithstanding the high carbohydrate intake, the athlete was unable to match the energy requirements of the competition. Despite signs of energy deficiency preexisting (oligomenorrhea and low T3), and other further developing during the race (weight loss), performance was in line with that of other world-tour cyclists and a best personal performance was recorded for the last stage. This case study emphasizes the need for further research to inform energy requirements for female athletes' optimal performance and health.
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Affiliation(s)
- Jose L Areta
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Emily Meehan
- Victorian Institute of Sport, Melbourne, VIC, Australia
| | - Georgie Howe
- Jayco-AlUla Cycling Team, South Australia, SA, Australia
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2
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Niclou A, Esparza-Romero J, Urquidez-Romero R, Lam YY, Rood J, Schulz LO, Bennett PH, Valencia ME, Ravussin E. Changes in energy expenditure and physical activity over 15 years of environmental changes: The Maycoba project. Obesity (Silver Spring) 2024; 32:1518-1525. [PMID: 38894515 DOI: 10.1002/oby.24061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 04/18/2024] [Accepted: 04/23/2024] [Indexed: 06/21/2024]
Abstract
OBJECTIVE This work aimed to parse out the role of changing environments on body composition, total energy expenditure, and physical activity in the Mexican Pima, a population experiencing rapid industrialization. METHODS Using doubly labeled water, we compared energy expenditure and physical activity in a longitudinal cohort of Mexican Pima (n = 26; female: 12) in 1995 and 2010. Body mass and composition were assessed by bioimpedance analysis. To determine the effects of environmental factors on body weight independent of age, we compared the 1995 longitudinal cohort with an age- and sex-matched cross-sectional cohort (n = 26) in 2010. RESULTS Body mass, fat mass, and fat-free mass all significantly increased between 1995 and 2010. Despite a 13% average increase in body weight, weight-adjusted total daily energy expenditure decreased significantly. Measured physical activity levels also decreased between 1995 and 2010, after we adjusted for weight. CONCLUSIONS Our results suggest that the recent industrialization of the Maycoba region in Sonora, Mexico, has contributed to a decrease in physical activity, in turn contributing to weight gain and metabolic disease among the Mexican Pima.
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Affiliation(s)
- Alexandra Niclou
- Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
| | - Julián Esparza-Romero
- Obesity and Diabetes Research Unit, Nutrition Coordination, Centro de Investigación en Alimentación y Desarrollo, A.C., Hermosillo, Mexico
| | - Rene Urquidez-Romero
- Institute of Biomedical Sciences, Department of Health Sciences, University Autonomous of Ciudad Juárez, Ciudad Juárez, Mexico
| | - Yan Y Lam
- Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Jennifer Rood
- Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
| | - Leslie O Schulz
- Department of Health Sciences, Northern Arizona University, Flagstaff, Arizona, USA
| | - Peter H Bennett
- Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Phoenix, Arizona, USA
| | - Mauro E Valencia
- Centro de Investigación en Alimentación y Desarrollo, A.C., Hermosillo, Mexico
| | - Eric Ravussin
- Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
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Flanagan E, Sanchez-Delgado G, Martin C, Ravussin E, Pontzer H, Redman L. No evidence for metabolic adaptation during exercise-related energy compensation. iScience 2024; 27:109842. [PMID: 38947494 PMCID: PMC11214370 DOI: 10.1016/j.isci.2024.109842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 01/08/2024] [Accepted: 04/25/2024] [Indexed: 07/02/2024] Open
Abstract
The constrained energy model posits that the increased total daily energy expenditure (TDEE) in response to exercise is often less than the energy cost of the exercise prescribed. The mechanisms behind this phenomenon, coined "exercise-related energy compensation" (ExEC), are poorly understood, and it is unknown if ExEC is coupled with metabolic adaptation. Using a randomized controlled 24-week exercise intervention, individuals who demonstrated ExEC were identified. Changes to all components of TDEE and metabolic adaptation were assessed using doubly labeled water over 14 days and room calorimetry over 24-h 48% of individuals exhibited ExEC (-308 ± 158 kcals/day). There were no statistically significant differences in sex, age, or BMI between ExEC and non-ExEC. ExEC was associated with baseline TDEE (r = -0.50, p = 0.006). There were no statistically significant differences in metabolic adaptations for 24 h, sleep, or resting expenditures. These findings reveal that ExEC occurs independent of metabolic adaptation in sedentary components of EE.
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Affiliation(s)
- E.W. Flanagan
- Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA 70808, USA
| | - G. Sanchez-Delgado
- Department of Medicine, Division of Endocrinology, Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Université de Sherbrooke, 12e Avenue N Porte 6, Sherbrooke, QC J1H 5N4, Canada
- University of Granada, Institute of Nutrition and Food Technology “José Mataix” and Sport and Health University Research Institute, Cuesta del Hospicio Viejo s/n, 18012 Granada, Spain
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Av. de Monforte de Lemos, 5, 28029 Madrid, Spain
| | - C.K. Martin
- Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA 70808, USA
| | - E. Ravussin
- Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA 70808, USA
| | - H. Pontzer
- Department of Evolutionary Anthropology, Duke University, 211 Biological Sciences, Durham, NC 27708, USA
| | - L.M. Redman
- Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA 70808, USA
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Bosch R, Sijbrands EJG, Snelder N. Quantification of the effect of GLP-1R agonists on body weight using in vitro efficacy information: An extension of the Hall body composition model. CPT Pharmacometrics Syst Pharmacol 2024. [PMID: 38867373 DOI: 10.1002/psp4.13183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 04/30/2024] [Accepted: 05/17/2024] [Indexed: 06/14/2024] Open
Abstract
Obesity has become a major public health concern worldwide. Pharmacological interventions with the glucagon-like peptide-1 receptor agonists (GLP-1RAs) have shown promising results in facilitating weight loss and improving metabolic outcomes in individuals with obesity. Quantifying drug effects of GLP-1RAs on energy intake (EI) and body weight (BW) using a QSP modeling approach can further increase the mechanistic understanding of these effects, and support obesity drug development. An extensive literature-based dataset was created, including data from several diet, liraglutide and semaglutide studies and their effects on BW and related parameters. The Hall body composition model was used to quantify and predict effects on EI. The model was extended with (1) a lifestyle change/placebo effect on EI, (2) a weight loss effect on activity for the studies that included weight management support, and (3) a GLP-1R agonistic effect using in vitro potency efficacy information. The estimated reduction in EI of clinically relevant dosages of semaglutide (2.4 mg) and liraglutide (3.0 mg) was 34.5% and 13.0%, respectively. The model adequately described the resulting change in BW over time. At 20 weeks the change in BW was estimated to be -17% for 2.4 mg semaglutide and -8% for 3 mg liraglutide, respectively. External validation showed the model was able to predict the effect of semaglutide on BW in the STEP 1 study. The GLP-1RA body composition model can be used to quantify and predict the effect of novel GLP-1R agonists on BW and changes in underlying processes using early in vitro efficacy information.
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Affiliation(s)
- Rolien Bosch
- LAP&P Consultants, Leiden, The Netherlands
- Department of Internal Medicine, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands
| | - Eric J G Sijbrands
- Department of Internal Medicine, Erasmus MC, University Medical Centre, Rotterdam, The Netherlands
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Carneiro MAS, Nunes PRP, Souza MVC, Assumpção CO, Orsatti FL. Full-body resistance training promotes greater fat mass loss than a split-body routine in well-trained males: A randomized trial. Eur J Sport Sci 2024; 24:846-854. [PMID: 38874955 PMCID: PMC11236007 DOI: 10.1002/ejsc.12104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 02/09/2024] [Accepted: 03/15/2024] [Indexed: 06/15/2024]
Abstract
While significant progress has been made in understanding the resistance training (RT) strategy for muscle hypertrophy increase, there remains limited knowledge about its impact on fat mass loss. This study aimed to investigate whether full-body is superior to split-body routine in promoting fat mass loss among well-trained males. Twenty-three participants were randomly assigned to 1 of 2 groups: full-body (n = 11, training muscle groups 5 days per week) and split-body (n = 12, training muscle groups 1 day per week). Both groups performed a weekly set volume-matched condition (75 sets/week, 8-12 repetition maximum at 70%-80 % of 1RM) for 8 weeks, 5 days per week with differences only in the routine. Whole-body and regional fat were assessed using DXA at the beginning and at the end of the study. Full-body RT elicited greater losses compared to split-body in whole-body fat mass (-0.775 ± 1.120 kg vs. +0.317 ± 1.260 kg; p = 0.040), upper-limb fat mass (-0.085 ± 0.118 kg vs. +0.066 ± 0.162 kg; p = 0.019), gynoid fat mass (-0.142 ± 0.230 kg vs. +0.123 ± 0.230 kg; p = 0.012), lower-limb fat mass (-0.197 ± 0.204 kg vs. +0.055 ± 0.328 kg; p = 0.040), and a trend in interaction in android fat mass (-0.116 ± 0.153 kg vs. +0.026 ± 0.174 kg; p = 0.051), with large effects sizes (η2 p ≥ 0.17). This study provides evidence that full-body is more effective in reducing whole-body and regional fat mass compared to split-body routine in well-trained males.
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Affiliation(s)
- Marcelo A. S. Carneiro
- Applied PhysiologyNutrition and Exercise Research Group (PhyNEr)Federal University of Triangulo MineiroUberabaMinas GeraisBrazil
- Metabolism, Nutrition and Exercise LaboratoryPhysical Education and Sport CenterLondrina State UniversityLondrinaParanáBrazil
| | - Paulo Ricardo P. Nunes
- Applied PhysiologyNutrition and Exercise Research Group (PhyNEr)Federal University of Triangulo MineiroUberabaMinas GeraisBrazil
- Department of Body and Human MovementMinas Gerais State University (UEMG)PassosMinas GeraisBrazil
| | - Markus V. C. Souza
- Applied PhysiologyNutrition and Exercise Research Group (PhyNEr)Federal University of Triangulo MineiroUberabaMinas GeraisBrazil
| | - Cláudio O. Assumpção
- Applied PhysiologyNutrition and Exercise Research Group (PhyNEr)Federal University of Triangulo MineiroUberabaMinas GeraisBrazil
| | - Fábio L. Orsatti
- Applied PhysiologyNutrition and Exercise Research Group (PhyNEr)Federal University of Triangulo MineiroUberabaMinas GeraisBrazil
- Department of Sport SciencesHealth Science InstituteFederal University of Triangulo MineiroUberabaMinas GeraisBrazil
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Hahm JH, Nirmala FS, Ha TY, Ahn J. Nutritional approaches targeting mitochondria for the prevention of sarcopenia. Nutr Rev 2024; 82:676-694. [PMID: 37475189 DOI: 10.1093/nutrit/nuad084] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/22/2023] Open
Abstract
A decline in function and loss of mass, a condition known as sarcopenia, is observed in the skeletal muscles with aging. Sarcopenia has a negative effect on the quality of life of elderly. Individuals with sarcopenia are at particular risk for adverse outcomes, such as reduced mobility, fall-related injuries, and type 2 diabetes mellitus. Although the pathogenesis of sarcopenia is multifaceted, mitochondrial dysfunction is regarded as a major contributor for muscle aging. Hence, the development of preventive and therapeutic strategies to improve mitochondrial function during aging is imperative for sarcopenia treatment. However, effective and specific drugs that can be used for the treatment are not yet approved. Instead studies on the relationship between food intake and muscle aging have suggested that nutritional intake or dietary control could be an alternative approach for the amelioration of muscle aging. This narrative review approaches various nutritional components and diets as a treatment for sarcopenia by modulating mitochondrial homeostasis and improving mitochondria. Age-related changes in mitochondrial function and the molecular mechanisms that help improve mitochondrial homeostasis are discussed, and the nutritional components and diet that modulate these molecular mechanisms are addressed.
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Affiliation(s)
- Jeong-Hoon Hahm
- Research Group of Aging and Metabolism, Korea Food Research Institute, Wanju-gun, South Korea
| | - Farida S Nirmala
- Research Group of Aging and Metabolism, Korea Food Research Institute, Wanju-gun, South Korea
- Department of Food Biotechnology, Korea University of Science and Technology, Daejeon-si, South Korea
| | - Tae Youl Ha
- Research Group of Aging and Metabolism, Korea Food Research Institute, Wanju-gun, South Korea
- Department of Food Biotechnology, Korea University of Science and Technology, Daejeon-si, South Korea
| | - Jiyun Ahn
- Research Group of Aging and Metabolism, Korea Food Research Institute, Wanju-gun, South Korea
- Department of Food Biotechnology, Korea University of Science and Technology, Daejeon-si, South Korea
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Ng MY, Song ZJ, Venkatesan G, Rodriguez-Cuenca S, West JA, Yang S, Tan CH, Ho PCL, Griffin JL, Vidal-Puig A, Bassetto M, Hagen T. Conjugating uncoupler compounds with hydrophobic hydrocarbon chains to achieve adipose tissue selective drug accumulation. Sci Rep 2024; 14:4932. [PMID: 38418847 PMCID: PMC10901892 DOI: 10.1038/s41598-024-54466-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 02/13/2024] [Indexed: 03/02/2024] Open
Abstract
One potential approach for treating obesity is to increase energy expenditure in brown and white adipose tissue. Here we aimed to achieve this outcome by targeting mitochondrial uncoupler compounds selectively to adipose tissue, thus avoiding side effects from uncoupling in other tissues. Selective drug accumulation in adipose tissue has been observed with many lipophilic compounds and dyes. Hence, we explored the feasibility of conjugating uncoupler compounds with a lipophilic C8-hydrocarbon chain via an ether bond. We found that substituting the trifluoromethoxy group in the uncoupler FCCP with a C8-hydrocarbon chain resulted in potent uncoupling activity. Nonetheless, the compound did not elicit therapeutic effects in mice, likely as a consequence of metabolic instability resulting from rapid ether bond cleavage. A lipophilic analog of the uncoupler compound 2,6-dinitrophenol, in which a C8-hydrocarbon chain was conjugated via an ether bond in the para-position (2,6-dinitro-4-(octyloxy)phenol), exhibited increased uncoupling activity compared to the parent compound. However, in vivo pharmacokinetics studies suggested that 2,6-dinitro-4-(octyloxy)phenol was also metabolically unstable. In conclusion, conjugation of a hydrophobic hydrocarbon chain to uncoupler compounds resulted in sustained or improved uncoupling activity. However, an ether bond linkage led to metabolic instability, indicating the need to conjugate lipophilic groups via other chemical bonds.
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Affiliation(s)
- Mei Ying Ng
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Zhi Jian Song
- School of Physical and Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore, Singapore
| | | | - Sergio Rodriguez-Cuenca
- Wellcome-MRC Institute of Metabolic Science and Medical Research Council Metabolic Diseases Unit, The University of Cambridge, Cambridge, UK
| | - James A West
- Department of Biochemistry, The University of Cambridge, Cambridge, UK
| | - Shili Yang
- Department of Pharmacy, Faculty of Science, National University of Singapore, Singapore, Singapore
| | - Choon Hong Tan
- School of Physical and Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore, Singapore
| | - Paul Chi-Lui Ho
- Department of Pharmacy, Faculty of Science, National University of Singapore, Singapore, Singapore
- School of Pharmacy, Monash University Malaysia, 47500, Subang Jaya, Malaysia
| | - Julian L Griffin
- The Rowett Institute of Nutrition and Health, The University of Aberdeen, Aberdeen, UK
| | - Antonio Vidal-Puig
- Wellcome-MRC Institute of Metabolic Science and Medical Research Council Metabolic Diseases Unit, The University of Cambridge, Cambridge, UK
| | - Marcella Bassetto
- School of Pharmacy and Pharmaceutical Sciences, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK.
| | - Thilo Hagen
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
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Nunes CL, Jesus F, Rosa GB, Marianito M, Francisco R, Bosy-Westphal A, Minderico CS, Martins P, Sardinha LB, Silva AM. Interindividual variability in energy intake and expenditure during a weight loss intervention. Appetite 2024; 193:107162. [PMID: 38101517 DOI: 10.1016/j.appet.2023.107162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 11/30/2023] [Accepted: 12/11/2023] [Indexed: 12/17/2023]
Abstract
INTRODUCTION Behavioral compensations may occur as a response to a negative energy balance. The aim of this study was to explore the associations between changes in energy intake (EI) and changes in physical activity (PA, min/day; kcal/d) as a response to a weight loss (WL) intervention and to understand if interindividual differences occur in EI and energy expenditure (EE). METHODS Eighty-one participants [mean (SD): age = 42.8 (9.4)y, BMI = 31.2 (4.4)kg/m2, 37% females] divided in intervention (IG, n = 43) and control group (CG, n = 38) were included. The IG underwent a moderate energy restriction (300-500 kcal/d). EI was measured through the intake-balance method. Non-exercise PA (NEPA) and exercise (through logbook) were assessed by accelerometery. The EE in NEPA (NEAT) and in exercise (EiEE) was calculated by applying the Freedson Combination'98 algorithm over the time spent in these activities. Pearson correlations were performed in IG to examine associations between EE components, EI and body composition. To understand if interindividual differences were observed, the SD of individual response (SDIR) and the smallest worthwhile change (SWC, SDbaselineCG×0.2) were calculated. RESULTS Changes in EI [Δ EI, (kcal/d)] was negatively associated with Δ exercise (min/d:r = -0.413, p = 0.045; %:r = -0.846, p = 0.008) and with Δ EiEE (kcal/d:r = -0.488, p = 0.016; %:r = -0.859, p = 0.006). A negative correlation was found between Δ sedentary time and Δ NEPA (min/d:r = -0.622, p = 0.002; %:r = -0.487, p = 0.018). An interindividual variability was found for EI(SDIR = 151.6, SWC = 72.3) and EE (SDIR = 165, SWC = 134). CONCLUSIONS Decreases in EI were not associated to compensatory responses such as decreases in PA and/or increases in sedentary time. Interindividual variability was found for EI and EE. Nevertheless, behavioral compensations and the interindividual variability should be considered when implementing WL interventions, to increase the likelihood of achieving sustainable results. (clinicaltrials.gov ID: NCT03031951).
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Affiliation(s)
- Catarina L Nunes
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Estrada da Costa, 1499-002 Cruz-Quebrada, Portugal; Atlântica, Instituto Universitário, Fábrica da Pólvora de Barcarena, Portugal
| | - Filipe Jesus
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Estrada da Costa, 1499-002 Cruz-Quebrada, Portugal
| | - Gil B Rosa
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Estrada da Costa, 1499-002 Cruz-Quebrada, Portugal
| | - Mariana Marianito
- Faculdade de Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz MB, 1649-028 Lisboa, Portugal
| | - Ruben Francisco
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Estrada da Costa, 1499-002 Cruz-Quebrada, Portugal
| | - Anja Bosy-Westphal
- Department of Human Nutrition, Institute of Human Nutrition and Food Sciences, Christian-Albrechts University, Kiel, Germany
| | - Cláudia S Minderico
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Estrada da Costa, 1499-002 Cruz-Quebrada, Portugal
| | - Paulo Martins
- Laboratory of Sport Psychology, Faculdade de Motricidade Humana da Universidade de Lisboa, 1499-002 Cruz-Quebrada, Portugal
| | - Luis B Sardinha
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Estrada da Costa, 1499-002 Cruz-Quebrada, Portugal
| | - Analiza M Silva
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Estrada da Costa, 1499-002 Cruz-Quebrada, Portugal.
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Bagot S, Pélissier L, Pereira B, Chanséaume Bussiere E, Duclos M, Dulloo A, Miles-Chan J, Charlot K, Boirie Y, Thivel D, Isacco L. Weight regain, body composition, and metabolic responses to weight loss in weight cycling athletes: A systematic review and meta-analyses. Obes Rev 2024; 25:e13658. [PMID: 38096860 DOI: 10.1111/obr.13658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 10/05/2023] [Accepted: 10/07/2023] [Indexed: 01/11/2024]
Abstract
Depending on the nature of their sports, athletes may be engaged in successive weight loss (WL) and regain, conducing to "weight cycling." The aims of this paper were to systematically (and meta-analytically when possible) analyze the post-WL recovery of (i) body weight and (ii) fat mass; fat-free mass; and performance and metabolic responses in weight cycling athletes (18-55 years old, body mass index < 30 kg.m-2 ). MEDLINE, Embase, and SPORTDiscus databases were explored. The quality and risk of bias of the 74 included studies were assessed using the quality assessment tool for quantitative studies. Thirty-two studies were eligible for meta-analyses. Whatever the type of sports or methods used to lose weight, post-WL body weight does not seem affected compared with pre-WL. While similar results are observed for fat-free mass, strength sports athletes (also having longer WL and regain periods) do not seem to fully recover their initial fat mass (ES: -0.39, 95% CI: [-0.77; -0.00], p = 0.048, I2 = 0.0%). Although the methods used by athletes to achieve WL might prevent them from a potential post-WL fat overshooting, further studies are needed to better understand WL episodes consequences on athletes' performance as well as short- and long-term physical, metabolic, and mental health.
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Affiliation(s)
- Sarah Bagot
- EA 3533, Laboratory of the Metabolic Adaptations to Exercise under Physiological and Pathological Conditions (AME2P), CRNH Auvergne, Clermont Auvergne University, Clermont-Ferrand, France
| | - Léna Pélissier
- EA 3533, Laboratory of the Metabolic Adaptations to Exercise under Physiological and Pathological Conditions (AME2P), CRNH Auvergne, Clermont Auvergne University, Clermont-Ferrand, France
| | - Bruno Pereira
- Unit of Biostatistics (DRCI), University Hospital Centre Clermont-Ferrand, Clermont-Ferrand, France
| | | | - Martine Duclos
- Department of Sport Medicine and Functional Explorations, University Hospital Centre Clermont-Ferrand, Clermont-Ferrand, France
- Faculty of Medicine and Paramedical Professions, National Observatory on Physical Activity and Sedentariness (ONAPS), University of Clermont Auvergne, Clermont-Ferrand, France
- International Research Chair Health in Motion, Clermont Auvergne University Foundation, Clermont-Ferrand, France
| | - Abdul Dulloo
- Department of Medicine/Physiology, University of Fribourg, Fribourg, Switzerland
| | - Jennifer Miles-Chan
- Human Nutrition Unit, School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Keyne Charlot
- Institut de recherche biomédicale des armées, Département Environnements Opérationnels, Unité de Physiologie des Exercices et Activités en Conditions Extrêmes, Bretigny-sur-Orge, France
- Exercise Biology Laboratory for Performance and Health (LBEPS), Paris-Saclay University, Evry, France
| | - Yves Boirie
- Department of Human Nutrition, University Hospital Centre Clermont-Ferrand, Clermont-Ferrand, France
| | - David Thivel
- EA 3533, Laboratory of the Metabolic Adaptations to Exercise under Physiological and Pathological Conditions (AME2P), CRNH Auvergne, Clermont Auvergne University, Clermont-Ferrand, France
- Faculty of Medicine and Paramedical Professions, National Observatory on Physical Activity and Sedentariness (ONAPS), University of Clermont Auvergne, Clermont-Ferrand, France
- International Research Chair Health in Motion, Clermont Auvergne University Foundation, Clermont-Ferrand, France
| | - Laurie Isacco
- EA 3533, Laboratory of the Metabolic Adaptations to Exercise under Physiological and Pathological Conditions (AME2P), CRNH Auvergne, Clermont Auvergne University, Clermont-Ferrand, France
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Stoner L, Higgins S, Paterson C. The 24-h activity cycle and cardiovascular outcomes: establishing biological plausibility using arterial stiffness as an intermediate outcome. Am J Physiol Heart Circ Physiol 2023; 325:H1243-H1263. [PMID: 37737729 DOI: 10.1152/ajpheart.00258.2023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 09/07/2023] [Accepted: 09/15/2023] [Indexed: 09/23/2023]
Abstract
This review proposes a biologically plausible working model for the relationship between the 24-h activity cycle (24-HAC) and cardiovascular disease. The 24-HAC encompasses moderate-to-vigorous physical activity (MVPA), light physical activity, sedentary behavior (SB), and sleep. MVPA confers the greatest relative cardioprotective effect, when considering MVPA represents just 2% of the day if physical activity guidelines (30 min/day) are met. While we have well-established guidelines for MVPA, those for the remaining activity behaviors are vague. The vague guidelines are attributable to our limited mechanistic understanding of the independent and additive effects of these behaviors on the cardiovascular system. Our proposed biological model places arterial stiffness, a measure of vascular aging, as the key intermediate outcome. Starting with prolonged exposure to SB or static standing, we propose that the reported transient increases in arterial stiffness are driven by a cascade of negative hemodynamic effects following venous pooling. The subsequent autonomic, metabolic, and hormonal changes further impair vascular function. Vascular dysfunction can be offset by using mechanistic-informed interruption strategies and by engaging in protective behaviors throughout the day. Physical activity, especially MVPA, can confer protection by chronically improving endothelial function and associated protective mechanisms. Conversely, poor sleep, especially in duration and quality, negatively affects hormonal, metabolic, autonomic, and hemodynamic variables that can confound the physiological responses to next-day activity behaviors. Our hope is that the proposed biologically plausible working model will assist in furthering our understanding of the effects of these complex, interrelated activity behaviors on the cardiovascular system.
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Affiliation(s)
- Lee Stoner
- Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States
- Department of Epidemiology, The Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States
- Center for Health Promotion and Disease Prevention, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States
| | - Simon Higgins
- Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States
| | - Craig Paterson
- Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States
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Mitchell SE, Togo J, Green CL, Derous D, Hambly C, Speakman JR. The Effects of Graded Levels of Calorie Restriction: XX. Impact of Long-Term Graded Calorie Restriction on Survival and Body Mass Dynamics in Male C57BL/6J Mice. J Gerontol A Biol Sci Med Sci 2023; 78:1953-1963. [PMID: 37354128 PMCID: PMC10613020 DOI: 10.1093/gerona/glad152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Indexed: 06/26/2023] Open
Abstract
Calorie restriction (CR) typically promotes a reduction in body mass, which correlates with increased lifespan. We evaluated the overall changes in survival, body mass dynamics, and body composition following long-term graded CR (580 days/19 months) in male C57BL/6J mice. Control mice (0% restriction) were fed ad libitum in the dark phase only (12-hour ad libitum [12AL]). CR groups were restricted by 10%-40% of their baseline food intake (10CR, 20CR, 30CR, and 40CR). Body mass was recorded daily, and body composition was measured at 8 time points. At 728 days/24 months, all surviving mice were culled. A gradation in survival rate over the CR groups was found. The pattern of body mass loss differed over the graded CR groups. Whereas the lower CR groups rapidly resumed an energy balance with no significant loss of fat or fat-free mass, changes in the 30 and 40CR groups were attributed to higher fat-free mass loss and protection of fat mass. Day-to-day changes in body mass were less variable under CR than for the 12AL group. There was no indication that body mass was influenced by external factors. Partial autocorrelation analysis examined the relationship between daily changes in body masses. A negative correlation between mass on Day 0 and Day +1 declined with age in the 12AL but not the CR groups. A reduction in the correlation with age suggested body mass homeostasis is a marker of aging that declines at the end of life and is protected by CR.
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Affiliation(s)
| | - Jacques Togo
- School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - Cara L Green
- School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - Davina Derous
- School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - Catherine Hambly
- School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - John R Speakman
- School of Biological Sciences, University of Aberdeen, Aberdeen, UK
- Shenzhen Key Laboratory of Metabolic Health, Center for Energy Metabolism and Reproduction, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, P.R. China
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, P.R. China
- China Medical University, Shenyang, Liaoning, P.R. China
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12
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Halsey LG, Areta JL, Koehler K. Does eating less or exercising more to reduce energy availability produce distinct metabolic responses? Philos Trans R Soc Lond B Biol Sci 2023; 378:20220217. [PMID: 37482781 PMCID: PMC10363695 DOI: 10.1098/rstb.2022.0217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 04/04/2023] [Indexed: 07/25/2023] Open
Abstract
When less energy is available to consume, people often lose weight, which reduces their overall metabolic rate. Their cellular metabolic rate may also decrease (metabolic adaptation), possibly reflected in physiological and/or endocrinological changes. Reduced energy availability can result from calorie restriction or increased activity energy expenditure, raising the following question that our review explores: do the body's metabolic and physiological responses to this reduction differ or not depending on whether they are induced by dietary restriction or increased activity? First, human studies offer indirect, contentious evidence that the body metabolically adapts to reduced energy availability, both in response to either a calorie intake deficit or increased activity (exercise; without a concomitant increase in food intake). Considering individual aspects of the body's physiology as constituents of whole-body metabolic rate, similar responses to reduced energy availability are observed in terms of reproductive capacity, somatic maintenance and hormone levels. By contrast, tissue phenotypic responses differ, most evidently for skeletal tissue, which is preserved in response to exercise but not calorie restriction. Thus, while in many ways 'a calorie deficit is a calorie deficit', certain tissues respond differently depending on the energy deficit intervention. This article is part of a discussion meeting issue 'Causes of obesity: theories, conjectures and evidence (Part I)'.
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Affiliation(s)
| | - José L. Areta
- Liverpool John Moores University, Liverpool, L3 3AF, UK
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13
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Recchia F, Leung CK, Yu AP, Leung W, Yu DJ, Fong DY, Montero D, Lee CH, Wong SHS, Siu PM. Dose-response effects of exercise and caloric restriction on visceral adiposity in overweight and obese adults: a systematic review and meta-analysis of randomised controlled trials. Br J Sports Med 2023; 57:1035-1041. [PMID: 36669870 PMCID: PMC10423480 DOI: 10.1136/bjsports-2022-106304] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/27/2022] [Indexed: 01/21/2023]
Abstract
OBJECTIVE To determine and compare the dose-response effects of exercise and caloric restriction on visceral adipose tissue in overweight and obese adults, while controlling for the weekly energy deficit induced by the interventions. METHODS PubMed, Embase, CINAHL and Web of Science were searched for randomised controlled trials comparing exercise or caloric restriction against eucaloric controls in overweight or obese adults. The primary outcome was the change in visceral fat measured by CT or MRI. Meta-analyses and meta-regressions were performed to determine the overall effect size (ES) and the dose-dependent relationship of exercise and caloric restriction on visceral fat. Heterogeneity, risk of bias and the certainty of evidence were also assessed. RESULTS Forty randomised controlled trials involving 2190 participants were included. Overall, exercise (ES -0.28 (-0.37 to -0.19); p<0.001; I2=25%) and caloric restriction (ES -0.53 (-0.71 to -0.35); p<0.001; I2=33%) reduced visceral fat compared with the controls. Exercise demonstrated a dose-response effect of -0.15 ((-0.23 to -0.07); p<0.001) per 1000 calories deficit per week, whereas the effect of caloric restriction was not dose-dependent (ES 0.03 (-0.12 to 0.18); p=0.64). Most of the studies showed a moderate risk of bias. CONCLUSIONS These findings support the dose-dependent effects of exercise to reduce visceral fat in overweight and obese adults. Caloric restriction did not demonstrate a dose-response relationship, although this may be attributed to the smaller number of studies available for analysis, compared with exercise studies. PROSPERO REGISTRATION NUMBER CRD42020210096.
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Affiliation(s)
- Francesco Recchia
- Division of Kinesiology, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | - Chit K Leung
- Division of Kinesiology, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | - Angus P Yu
- Division of Kinesiology, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | - Welton Leung
- Division of Kinesiology, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | - Danny J Yu
- Department of Psychiatry, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Daniel Y Fong
- School of Nursing, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | - David Montero
- Division of Kinesiology, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | - Chi-Ho Lee
- Department of Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | - Stephen H S Wong
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Parco M Siu
- Division of Kinesiology, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, Hong Kong
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14
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Fanning J, Nicklas B, Furlipa J, Rejeski WJ. The impact of Dietary Weight loss, Aerobic Exercise, and Daylong Movement on Social Cognitive Mediators of Long-term Weight loss. J Behav Med 2023; 46:499-508. [PMID: 36215000 PMCID: PMC9548422 DOI: 10.1007/s10865-022-00359-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 08/17/2022] [Indexed: 11/24/2022]
Abstract
This report contrasts the impact of a dietary weight loss intervention (WL) paired with aerobic exercise (EX) and/or sitting less and moving throughout the day (SL) on self-efficacy for walking (hereafter walking self-efficacy) and satisfaction with physical functioning (hereafter satisfaction). Additional analyses examined dose-response associations between change in weight and changes in these key outcomes. Older adults (N = 112; age = 70.21[Formula: see text]4.43) were randomized to 6 months of WL+EX, WL+SL, or WL+EX+SL followed by a 12-month maintenance period. All groups reported increases in walking self-efficacy at month 6 with greater improvements in WL+EX and WL + EX+SL. Only WL+SL demonstrated improved walking self-efficacy at month 18. All conditions demonstrated improved satisfaction scores at both time points. Changes in walking self-efficacy and satisfaction were negatively associated with change in weight over the 6-month intervention and after the maintenance period. These results support the utility of WL + SL for improving key social cognitive outcomes in aging.
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Affiliation(s)
- Jason Fanning
- Department of Health and Exercise Science, Wake Forest University, Winston-Salem, NC, USA.
| | - Barbara Nicklas
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Joy Furlipa
- Department of Health and Exercise Science, Wake Forest University, Winston-Salem, NC, USA
| | - W Jack Rejeski
- Department of Health and Exercise Science, Wake Forest University, Winston-Salem, NC, USA
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15
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Singh P, Beyl RA, Stephens JM, Noland RC, Richard AJ, Boudreau A, Hebert RC, Ravussin E, Broussard JL, St-Onge MP, Marlatt KL. Effect of sleep restriction on insulin sensitivity and energy metabolism in postmenopausal women: A randomized crossover trial. Obesity (Silver Spring) 2023; 31:1204-1215. [PMID: 36998155 PMCID: PMC10191900 DOI: 10.1002/oby.23739] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 01/10/2023] [Accepted: 01/26/2023] [Indexed: 04/01/2023]
Abstract
OBJECTIVE The aim of this study was to investigate the effect of sleep restriction (SR) on insulin sensitivity and energy metabolism in postmenopausal women. METHODS In a randomized crossover trial, 14 women underwent four nights of habitual sleep (HS, 100% normal sleep) and SR (60% of HS) while following a eucaloric diet. Outcomes included the following: (1) insulin sensitivity by hyperinsulinemic-euglycemic clamp, defined as the glucose infusion rate (GIR); (2) resting metabolism and substrate oxidation by indirect calorimetry; and (3) glucose, insulin, and C-peptide concentrations following a standard meal test. RESULTS Nine postmenopausal women (mean [SD], age 59 [4] years, BMI 28.0 [2.6] kg/m2 ) were analyzed. Accelerometer-determined total time in bed was 8.4 ± 0.6 hours during HS versus 5.0 ± 0.4 hours during SR (38% reduction, p < 0.0001). SR reduced low-dose insulin GIR by 20% (HS: 2.55 ± 0.22 vs. SR: 2.03 ± 0.20 mg/kg/min; p = 0.01) and high-dose insulin GIR by 12% (HS: 10.48 ± 0.72 vs. SR: 9.19 ± 0.72 mg/kg/min; p < 0.001). SR reduced fat oxidation during high-dose insulin infusion (p < 0.01), and it did not alter resting energy metabolism. CONCLUSIONS Four nights of SR reduced insulin sensitivity and fat oxidation in postmenopausal women. These findings underscore the role of insufficient sleep in metabolic dysfunction following menopause. Larger trials investigating how sleep disturbances cause metabolic dysfunction during menopause are needed across all stages of menopause.
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Affiliation(s)
- Prachi Singh
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - Robbie A. Beyl
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | | | | | | | - Anik Boudreau
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | | | - Eric Ravussin
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - Josiane L. Broussard
- Department of Health & Exercise Science, Colorado State University, Fort Collins, CO, USA
| | - Marie-Pierre St-Onge
- Department of Medicine, Columbia University Irving Medical Center, New York, NY, USA
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16
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Chen SY, Beretta M, Olzomer EM, Shah DP, Wong DYH, Alexopoulos SJ, Aleksovska I, Salamoun JM, Garcia CJ, Cochran BJ, Rye KA, Smith GC, Byrne FL, Morris MJ, Santos WL, Cantley J, Hoehn KL. Targeting negative energy balance with calorie restriction and mitochondrial uncoupling in db/db mice. Mol Metab 2023; 69:101684. [PMID: 36731653 PMCID: PMC9932728 DOI: 10.1016/j.molmet.2023.101684] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 02/01/2023] Open
Abstract
OBJECTIVE Calorie restriction is a first-line treatment for overweight individuals with metabolic impairments. However, few patients can adhere to long-term calorie restriction. An alternative approach to calorie restriction that also causes negative energy balance is mitochondrial uncoupling, which decreases the amount of energy that can be extracted from food. Herein we compare the metabolic effects of calorie restriction with the mitochondrial uncoupler BAM15 in the db/db mouse model of severe hyperglycemia, obesity, hypertriglyceridemia, and fatty liver. METHODS Male db/db mice were treated with ∼50% calorie restriction, BAM15 at two doses of 0.1% and 0.2% (w/w) admixed in diet, or 0.2% BAM15 with time-restricted feeding from 5 weeks of age. Mice were metabolically phenotyped over 4 weeks with assessment of key readouts including body weight, glucose tolerance, and liver steatosis. At termination, liver tissues were analysed by metabolomics and qPCR. RESULTS Calorie restriction and high-dose 0.2% BAM15 decreased body weight to a similar extent, but mice treated with BAM15 had far better improvement in glucose control. High-dose BAM15 treatment completely normalized fasting glucose and glucose tolerance to levels similar to lean db/+ control mice. Low-dose 0.1% BAM15 did not affect body mass but partially improved glucose tolerance to a similar degree as 50% calorie restriction. Both calorie restriction and high-dose BAM15 significantly improved hyperglucagonemia and liver and serum triglyceride levels. Combining high-dose BAM15 with time-restricted feeding to match the time that calorie restricted mice were fed resulted in the best metabolic phenotype most similar to lean db/+ controls. BAM15-mediated improvements in glucose control were associated with decreased glucagon levels and decreased expression of enzymes involved in hepatic gluconeogenesis. CONCLUSIONS BAM15 and calorie restriction treatments improved most metabolic disease phenotypes in db/db mice. However, mice fed BAM15 had superior effects on glucose control compared to the calorie restricted group that consumed half as much food. Submaximal dosing with BAM15 demonstrated that its beneficial effects on glucose control are independent of weight loss. These data highlight the potential for mitochondrial uncoupler pharmacotherapies in the treatment of metabolic disease.
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Affiliation(s)
- Sing-Young Chen
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Martina Beretta
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Ellen M Olzomer
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Divya P Shah
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Derek Y H Wong
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Stephanie J Alexopoulos
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Isabella Aleksovska
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Joseph M Salamoun
- Department of Chemistry and Virginia Tech Centre for Drug Discovery, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Christopher J Garcia
- Department of Chemistry and Virginia Tech Centre for Drug Discovery, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Blake J Cochran
- School of Biomedical Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Kerry-Anne Rye
- School of Biomedical Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Greg C Smith
- School of Biomedical Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Frances L Byrne
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Margaret J Morris
- School of Biomedical Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Webster L Santos
- Department of Chemistry and Virginia Tech Centre for Drug Discovery, Virginia Tech, Blacksburg, VA, 24061, USA
| | - James Cantley
- School of Medicine, University of Dundee, Dundee DD1 4HN, UK
| | - Kyle L Hoehn
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW, 2052, Australia.
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17
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Weight Bias in Obstetrics. CURRENT OBSTETRICS AND GYNECOLOGY REPORTS 2023. [DOI: 10.1007/s13669-023-00348-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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18
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Cantarero Prieto D, Lanza-León P, Moreno P, Blázquez-Fernández C, Lera J, Gonzalez-Diego FJ, González Rodríguez I. Change in eating habits during the Spanish COVID-19 pandemic lockdown: evidence for a sample of university community. PeerJ 2023; 11:e14244. [PMID: 36718453 PMCID: PMC9884042 DOI: 10.7717/peerj.14244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 09/23/2022] [Indexed: 01/26/2023] Open
Abstract
Background The stress and anxiety caused by COVID-19 lockdown may have changed the eating habits of the population. Our aim is to assess the eating changes that have taken place due to the pandemic. Methods Data were collected through an electronic survey created by the Health Economics Research Group of the University of Cantabria and IDIVAL and conducted between 14/01/2021 and 19/02/2021. A total of 1,417 responses were recorded, but only 507 complete observations were considered. We carried out a cross-sectional analysis through ordered probit regressions. Results The improvement in post-confinement eating habits is associated with higher income level, better self-assessed health status and more physical activity. The worsening of eating habits is associated with having a certain level of nomophobia or the fear of contagion. Conclusions Our analysis can be used for designing and implementing new strategies to overcome the negative spill overs of the COVID-19 pandemic and improve the dietary patterns.
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Affiliation(s)
- David Cantarero Prieto
- Universidad de Cantabria, Santander, Spain,Valdecilla Biomedical Institute Research (IDIVAL), Santander, Spain
| | - Paloma Lanza-León
- Universidad de Cantabria, Santander, Spain,Valdecilla Biomedical Institute Research (IDIVAL), Santander, Spain
| | | | - Carla Blázquez-Fernández
- Universidad de Cantabria, Santander, Spain,Valdecilla Biomedical Institute Research (IDIVAL), Santander, Spain
| | - Javier Lera
- Valdecilla Biomedical Institute Research (IDIVAL), Santander, Spain
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19
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Nunes CL, Rosa GB, Jesus F, Heymsfield SB, Minderico CS, Martins P, Sardinha LB, Silva AM. Interindividual variability in metabolic adaptation of non-exercise activity thermogenesis after a 1-year weight loss intervention in former elite athletes. Eur J Sport Sci 2022:1-10. [PMID: 36377398 DOI: 10.1080/17461391.2022.2147020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Lack of efficacy of weight loss(WL) interventions is attributed in-part to low adherence to dietary/physical activity(PA) recommendations. However, some compensation may occur in PA as a response to energy restriction such as a decrease in non-exercise PA(NEPA) or non-exercise activity thermogenesis(NEAT). The current study aim was (1) to investigate whether adaptive thermogenesis(AT) in NEAT occurs after WL, and (2) to understand the associations of these compensations with WL. Ninety-four former athletes [mean±SD, age: 43.0±9.4y, BMI: 31.1±4.3 kg/m2, 34.0% female] were recruited and randomly assigned to intervention or control groups (IG, CG). The IG underwent a one-year lifestyle WL-intervention; no treatments were administered to the CG. PA was measured using accelerometery and NEAT was predicted with a model including sample baseline characteristics. AT was calculated as measuredNEAT4mo/12mo(kcal/d)-predictedNEAT4mo/12mo(kcal/d)-measuredNEATbaseline(kcal/d)-predictedNEATbaseline(kcal/d). Dual-energy x-ray absorptiometry was used to assess fat-free mass and fat mass. No differences were found in the IG for NEAT or NEPA after WL. Considering mean values, AT was not found for either group. The SD of individual response (SDIR) for AT was -2(4-months) and 24(12-months) (smallest worthwhile change = 87kcal/d), suggesting that the interindividual variability regarding AT in NEAT is not relevant and the variability in this outcome might reflect a large within-subject variability and/or a large degree of random measurement error. No associations were found between AT in NEAT and changes in body composition. Further studies are needed to clarify the mechanisms behind the large variability in AT observed in NEAT and related changes in NEPA to better implement lifestyle-induced WL interventions.Highlights No significant differences were found for non-exercise activity thermogenesis (NEAT) or non-exercise physical activity (NEPA) after the weight loss (WL) intervention;Although a large variability was found for NEAT and NEPA, the interindividual variability regarding these outcomes is not relevant. The variability in these outcomes might reflect a large within-subject variability and/or a large degree of random measurement error;Although no energy conservation was observed in NEAT after moderate WL (mean values), further studies are needed to clarify the mechanisms behind the large variability in adaptive thermogenesis observed in NEAT and related changes in NEPA to better implement lifestyle-induced WL interventions.Trial registration: ClinicalTrials.gov identifier: NCT03031951.
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Affiliation(s)
- Catarina L Nunes
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Cruz-Quebrada, Portugal
| | - Gil B Rosa
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Cruz-Quebrada, Portugal
| | - Filipe Jesus
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Cruz-Quebrada, Portugal
| | | | - Cláudia S Minderico
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Cruz-Quebrada, Portugal
| | - Paulo Martins
- Laboratory of Sport Psychology, Faculdade de Motricidade Humana da Universidade de Lisboa, Cruz-Quebrada, Portugal
| | - Luis B Sardinha
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Cruz-Quebrada, Portugal
| | - Analiza M Silva
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Cruz-Quebrada, Portugal
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20
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Si K, Hu Y, Wang M, Apovian CM, Chavarro JE, Sun Q. Weight loss strategies, weight change, and type 2 diabetes in US health professionals: A cohort study. PLoS Med 2022; 19:e1004094. [PMID: 36166473 PMCID: PMC9514663 DOI: 10.1371/journal.pmed.1004094] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 08/17/2022] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Weight loss is crucial for disease prevention among individuals with overweight or obesity. This study aimed to examine associations of weight loss strategies (WLSs) with weight change and type 2 diabetes (T2D) risk among US health professionals. METHODS AND FINDINGS This study included 93,110 participants (24 to 60 years old; 11.6% male) from the Nurses' Health Study (NHS), NHSII, and Health Professionals Follow-Up Study (HPFS) cohorts who were free of T2D, cardiovascular disease, and cancer at baseline (1988 for NHS/HPFS and 1989 for NHSII) for analyses of weight change and 104,180 (24 to 78 years old; 14.2% male) for T2D risk assessment. WLSs used to achieve an intentional weight loss of 4.5+ kg were collected in 1992 (NHS/HPFS)/1993 (NHSII) and grouped into 7 mutually exclusive categories, including low-calorie diet, exercise, low-calorie diet and exercise, fasting, commercial weight loss program (CWLP), diet pills, and FCP (selected at least 2 methods from fasting, CWLP, and pill). The reference group was participants who did not attempt to lose weight. Generalized estimating equations and Cox regression were applied to estimate up to 10-year weight change trajectory and incident T2D risk through 2016 (NHS/HPFS)/2017 (NHSII), respectively. The associations of WLSs with weight change and T2D risk were differential by baseline body weight (Pinteraction < 0.01). Among individuals with obesity, all WLSs tended to associate with less weight gain [ranging from -4.2% (95% confidence interval (CI), -5.1% to -3.2%; P < 0.001) for exercise to -0.3% (-1.2% to 0.7%; P > 0.99) for FCP] and a lower T2D risk [hazard ratios (HRs) ranging from 0.79 (0.66 to 0.95; P = 0.04) for exercise to 0.87 (0.66 to 1.13; P = 0.30) for pill]. Such a pattern was less clear among overweight individuals: the difference of weight change varied from -2.5% (-3.0% to -2.1%; P < 0.001) for exercise to 2.0% (1.3% to 2.7%; P < 0.001) for FCP, and HRs of T2D varied from 0.91 (0.77 to 1.07; P = 0.29) for exercise to 1.42 (1.11 to 1.81; P = 0.02) for pill. The pattern was further inverted among lean individuals in that weight change ranged from -0.4% (-0.6% to -0.1%; P = 0.02) for exercise to 3.7% (3.1% to 4.3%; P < 0.001) for FCP, and the HRs of T2D ranged from 1.09 (0.91 to 1.30; P = 0.33) for exercise to 1.54 (1.13 to 2.10; P = 0.008) for pill. Approximately 15.6% to 46.8% of the association between WLSs and the T2D risk was attributed to weight changes. This study was limited by a single assessment of WLSs, heterogeneity within each WLS, and potential misclassification of the timing of weight loss and weight regain. CONCLUSIONS The current study showed that individuals with obesity who attempted to lose weight, regardless of the WLSs used, tended to gain less body weight and have a lower diabetes risk. In contrast, lean individuals who intentionally lost weight tended to gain more weight and have a higher diabetes risk. These data support the notion that intentional weight loss may not be beneficial for lean individuals and the use of WLSs for achieving weight loss shall be guided by medical indications only.
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Affiliation(s)
- Keyi Si
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America
| | - Yang Hu
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America
| | - Molin Wang
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America
| | - Caroline M. Apovian
- Division of Endocrinology, Diabetes, and Hypertension, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jorge E. Chavarro
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
| | - Qi Sun
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
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21
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Ehrlicher SE, Chui TK, Clina JG, Ellison KM, Sayer RD. The Data Behind Popular Diets for Weight Loss. Med Clin North Am 2022; 106:739-766. [PMID: 36154698 DOI: 10.1016/j.mcna.2022.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Both scientific evidence and popular diet trends have sought to identify the ideal diet for weight loss with strategies focused on either restricting carbohydrates or fat. While there is a strong physiologic rationale for either carbohydrate restriction or fat restriction to achieve a calorie deficit needed for weight loss, evidence from randomized controlled trials suggest either type of diet is effective for weight loss. The level of adherence, rather than macronutrient content, is the driver of successful weight loss.
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Affiliation(s)
- Sarah E Ehrlicher
- Department of Nutrition Sciences, University of Alabama at Birmingham, Webb 256, 1675 University Boulevard, Birmingham, AL 35294, USA.
| | - Tsz-Kiu Chui
- Department of Nutrition Sciences, University of Alabama at Birmingham, Webb 630, 1675 University Blvd, Birmingham, AL 35294, USA
| | - Julianne G Clina
- Department of Nutrition Sciences, University of Alabama at Birmingham, Webb 630, 1675 University Blvd, Birmingham, AL 35294, USA
| | - Katie M Ellison
- Department of Nutrition Sciences, University of Alabama at Birmingham, Webb 630, 1675 University Blvd, Birmingham, AL 35294, USA
| | - R Drew Sayer
- Department of Nutrition Sciences, University of Alabama at Birmingham, Webb 634, 1675 University Boulevard, Birmingham, AL 35294, USA
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22
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Exploratory analysis of eating- and physical activity-related outcomes from a randomized controlled trial for weight loss maintenance with exercise and liraglutide single or combination treatment. Nat Commun 2022; 13:4770. [PMID: 35970829 PMCID: PMC9378667 DOI: 10.1038/s41467-022-32307-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 07/26/2022] [Indexed: 11/09/2022] Open
Abstract
Weight regain after weight loss remains a major challenge in obesity treatment and may involve alteration of eating and sedentary behavior after weight loss. In this randomized, controlled, double-blind trial, adults with obesity were randomized, in a 1:1:1:1 ratio stratified by sex and age group (<40 years and ≥40 years), to one-year weight loss maintenance with exercise, the GLP-1 receptor agonist liraglutide, or the combination, as compared with placebo, after low-calorie diet-induced weight loss. Primary outcome was change in body weight, which has been published. Here, we investigated the effects of weight loss maintenance with exercise, liraglutide, or the combination on weight loss-induced changes in the pre-specified explorative outcomes, eating and sedentary behavior in 130 participants who completed the trial according to the study protocol (exercise (n = 26), liraglutide (n = 36), combination (n = 29), and placebo (n = 39)). One year after weight loss, the placebo group had decreased postprandial appetite suppression score by 14%, and increased sedentary time by 31 min/day and regained weight. Liraglutide prevented the decrease in postprandial appetite suppression score compared with placebo (0% vs. -14%; P = 0.023) and maintained weight loss. Exercise after weight loss did not increase appetite or sedentary behavior compared with placebo, despite increased exercise energy expenditure and maintained weight loss. The combination of exercise and liraglutide increased cognitive restraint score (13% vs. -9%; P = 0.042), reflecting a conscious restriction of food intake, and decreased sedentary time by 41 min/day (-10 vs. 31 min/day; 95%CI, -82.3 to -0.2; P = 0.049) compared with placebo, which may have facilitated the additional weight loss. Targeting both eating and sedentary behavior could be the most effective for preventing weight regain.Trial registration: EudraCT number, 2015-005585-32; clinicaltrials.gov number, NCT04122716.
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23
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Nunes CL, Jesus F, Francisco R, Hopkins M, Sardinha LB, Martins P, Minderico CS, Silva AM. Effects of a 4-month active weight loss phase followed by weight loss maintenance on adaptive thermogenesis in resting energy expenditure in former elite athletes. Eur J Nutr 2022; 61:4121-4133. [PMID: 35833970 DOI: 10.1007/s00394-022-02951-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 06/27/2022] [Indexed: 11/04/2022]
Abstract
PURPOSE Despite adaptive thermogenesis (AT) being studied as a barrier to weight loss (WL), few studies assessed AT in the resting energy expenditure (REE) compartment after WL maintenance. The aim of this study was twofold: (1) to understand if AT occurs after a moderate WL and if AT persists after a period of WL maintenance; and (2) if AT is associated with changes in body composition, hormones and energy intake (EI). METHODS Ninety-four participants [mean (SD); BMI, 31.1(4.3)kg/m2; 43.0(9.4)y; 34% female] were randomized to intervention (IG, n = 49) or control groups (CG, n = 45). Subjects underwent a 1-year lifestyle intervention, divided in 4 months of an active WL followed by 8 months of WL maintenance. Fat mass (FM) and fat-free mass (FFM) were measured by dual-energy X-ray absorptiometry and REE by indirect calorimetry. Predicted REE (pREE) was estimated through a model using FM, FFM. EI was measured by the "intake-balance" method. RESULTS For the IG, the weight and FM losses were - 4.8 (4.9) and - 11.3 (10.8)%, respectively (p < 0.001). A time-group interaction was found between groups for AT. After WL, the IG showed an AT of -85(29) kcal.d-1 (p < 0.001), and remained significant after 1 year [AT = - 72(31)kcal.d-1, p = 0.031]. Participants with higher degrees of restriction were those with an increased energy conservation (R = - 0.325, p = 0.036 and R = - 0.308, p = 0.047, respectively). No associations were found between diet adherence and AT. Following a sub-analysis in the IG, the group with a higher energy conservation showed a lower WL and fat loss and a higher initial EI. CONCLUSION AT in REE occurred after a moderate WL and remained significant after WL maintenance. More studies are needed to better clarify the mechanisms underlying the large variability observed in AT and providing an accurate methodological approach to avoid overstatements. Future studies on AT should consider not only changes in FM and FFM but also the FFM composition.
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Affiliation(s)
- Catarina L Nunes
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Estrada da Costa, 1499-002, Cruz-Quebrada, Portugal
| | - Filipe Jesus
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Estrada da Costa, 1499-002, Cruz-Quebrada, Portugal
| | - Ruben Francisco
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Estrada da Costa, 1499-002, Cruz-Quebrada, Portugal
| | - Mark Hopkins
- School of Food Science and Nutrition, Faculty of Environment, University of Leeds, Leeds, UK
| | - Luís B Sardinha
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Estrada da Costa, 1499-002, Cruz-Quebrada, Portugal
| | - Paulo Martins
- Laboratory of Sport Psychology, Faculdade de Motricidade Humana da Universidade de Lisboa, 1499-002, Cruz-Quebrada, Portugal
| | - Cláudia S Minderico
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Estrada da Costa, 1499-002, Cruz-Quebrada, Portugal
| | - Analiza M Silva
- Exercise and Health Laboratory, CIPER, Faculdade Motricidade Humana, Universidade Lisboa, Estrada da Costa, 1499-002, Cruz-Quebrada, Portugal.
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Energy Availability Over One Athletic Season: An Observational Study Among Athletes From Different Sports. Int J Sport Nutr Exerc Metab 2022; 32:479-490. [PMID: 35894910 DOI: 10.1123/ijsnem.2022-0039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 05/09/2022] [Accepted: 05/18/2022] [Indexed: 11/18/2022]
Abstract
During the athletic season, changes in body composition occur due to fluctuations in energy expenditure and energy intake. Literature regarding changes of energy availability (EA) is still scarce. The aim was to estimate EA of athletes from nonweight and weight-sensitive sports during the athletic season (i.e., preparatory and competitive phase). Eighty-eight athletes (19.1 ± 4.2 years, 21.8 ± 2.0 kg/m2, 27% females, self-reported eumenorrheic) from five sports (basketball [n = 29]; handball [n = 7]; volleyball [n = 9]; swimming [n = 18]; and triathlon [n = 25]) were included in this observational study. Energy intake and exercise energy expenditure were measured through doubly labeled water (over 7 days and considering neutral energy balance) and metabolic equivalents of tasks, respectively. Fat-free mass (FFM) was assessed through a four-compartment model. EA was calculated as EA = (energy intake - exercise energy expenditure)/FFM. Linear mixed models, adjusted for sex, were performed to assess EA for the impact of time by sport interaction. Among all sports, EA increased over the season: basketball, estimated mean (SE): 7.2 (1.5) kcal/kg FFM, p < .001; handball, 14.8 (2.9) kcal/kg FFM, p < .001; volleyball, 7.9 (2.8) kcal/kg FFM, p = .006; swimming, 8.7 (2.0) kcal/kg FFM, p < .001; and triathlon, 9.6 (2.0) kcal/kg FFM, p < .001. Eleven athletes (12.5%) had clinical low EA at the preparatory phase and none during the competitive phase. During both assessments, triathletes' EA was below optimal, being lower than basketballers (p < .001), volleyballers (p < .05), and swimmers (p < .001). Although EA increased in all sports, triathlon's EA was below optimal during both assessments. Risk of low EA might be seasonal and resolved throughout the season, with higher risk during the preparatory phase. However, in weight-sensitive sports, namely triathlon, low EA is still present.
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25
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Mauldin K, May M, Clifford D. The consequences of a weight-centric approach to healthcare: A case for a paradigm shift in how clinicians address body weight. Nutr Clin Pract 2022; 37:1291-1306. [PMID: 35819360 DOI: 10.1002/ncp.10885] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 04/27/2022] [Accepted: 05/14/2022] [Indexed: 11/10/2022] Open
Abstract
Current healthcare is weight-centric, equating weight and health. This approach to healthcare has negative consequences on patient well-being. The aim of this article is to make a case for a paradigm shift in how clinicians view and address body weight. In this review, we (1) address common flawed assumptions in the weight-centric approach to healthcare, (2) review the weight science literature and provide evidence for the negative consequences of promoting dieting and weight loss, and (3) provide practice recommendations for weight-inclusive care.
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Affiliation(s)
- Kasuen Mauldin
- Department of Nutrition, Food Science, and Packaging, San José State University, San José, California, USA.,Department of Clinical Nutrition, Stanford Health Care, Stanford, California, USA
| | - Michelle May
- Am I Hungry? Mindful Eating Programs and Training, USA.,Department of Psychology, Arizona State University, Tempe, Arizona, USA
| | - Dawn Clifford
- Department of Health Sciences, Northern Arizona University, Flagstaff, Arizona, USA
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26
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Sundaresan S, Antoun J, Banan B, Adcock J, Johnson C, Claire B, Dixon K, Flynn J, Shibao CA, Abumrad N. Botulinum Injection Into the Proximal Intestinal Wall of Diet-Induced Obese Mice Leads to Weight Loss and Improves Glucose and Fat Tolerance. Diabetes 2022; 71:1424-1438. [PMID: 35476783 PMCID: PMC9490449 DOI: 10.2337/db21-0708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 04/13/2022] [Indexed: 11/13/2022]
Abstract
Botulinum neurotoxin (available commercially as BOTOX) has been used successfully for treatment of several neuromuscular disorders, including blepharospasm, dystonia, spasticity, and cerebral palsy in children. Our data demonstrate that injection of Botox into the proximal intestinal wall of diet-induced obese (DIO) mice induces weight loss and reduces food intake. This was associated with amelioration of hyperglycemia, hyperlipidemia, and significant improvement of glucose tolerance without alteration of energy expenditure. We also observed accelerated gastrointestinal transit and significant reductions in glucose and lipid absorption, which may account, at least in part, for the observed weight loss and robust metabolic benefits, although possible systemic effects occurring as a consequence of central and/or peripheral signaling cannot be ignored. The observed metabolic benefits were found to be largely independent of weight loss, as demonstrated by pair-feeding experiments. Effects lasted ∼8 weeks, for as long as the half-life of Botox as reported in prior rodent studies. These results have valuable clinical implications. If the observed effects are translatable in humans, this approach could lay the foundation for therapeutic approaches geared toward robust and sustained weight loss, mimicking some of the benefits of bariatric operations without its cost and complications.
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Affiliation(s)
- Sinju Sundaresan
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN
- Department of Physiology, Midwestern University, Downers Grove, IL
- Corresponding author: Sinju Sundaresan,
| | - Joseph Antoun
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - Babak Banan
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - Jamie Adcock
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - Connor Johnson
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - Brendan Claire
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - Kala Dixon
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - Joyce Flynn
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - Cyndya A. Shibao
- Department of Physiology, Midwestern University, Downers Grove, IL
| | - Naji Abumrad
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN
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27
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Popp CJ, Zhou B, Manigrasso MB, Li H, Curran M, Hu L, St-Jules DE, Alemán JO, Vanegas SM, Jay M, Bergman M, Segal E, Sevick MA, Schmidt AM. Soluble Receptor for Advanced Glycation End Products (sRAGE) Isoforms Predict Changes in Resting Energy Expenditure in Adults with Obesity during Weight Loss. Curr Dev Nutr 2022; 6:nzac046. [PMID: 35542387 PMCID: PMC9071542 DOI: 10.1093/cdn/nzac046] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/17/2022] [Accepted: 03/24/2022] [Indexed: 01/05/2023] Open
Abstract
Background Accruing evidence indicates that accumulation of advanced glycation end products (AGEs) and activation of the receptor for AGEs (RAGE) play a significant role in obesity and type 2 diabetes. The concentrations of circulating RAGE isoforms, such as soluble RAGE (sRAGE), cleaved RAGE (cRAGE), and endogenous secretory RAGE (esRAGE), collectively sRAGE isoforms, may be implicit in weight loss and energy compensation resulting from caloric restriction. Objectives We aimed to evaluate whether baseline concentrations of sRAGE isoforms predicted changes (∆) in body composition [fat mass (FM), fat-free mass (FFM)], resting energy expenditure (REE), and adaptive thermogenesis (AT) during weight loss. Methods Data were collected during a behavioral weight loss intervention in adults with obesity. At baseline and 3 mo, participants were assessed for body composition (bioelectrical impedance analysis) and REE (indirect calorimetry), and plasma was assayed for concentrations of sRAGE isoforms (sRAGE, esRAGE, cRAGE). AT was calculated using various mathematical models that included measured and predicted REE. A linear regression model that adjusted for age, sex, glycated hemoglobin (HbA1c), and randomization arm was used to test the associations between sRAGE isoforms and metabolic outcomes. Results Participants (n = 41; 70% female; mean ± SD age: 57 ± 11 y; BMI: 38.7 ± 3.4 kg/m2) experienced modest and variable weight loss over 3 mo. Although baseline sRAGE isoforms did not predict changes in ∆FM or ∆FFM, all baseline sRAGE isoforms were positively associated with ∆REE at 3 mo. Baseline esRAGE was positively associated with AT in some, but not all, AT models. The association between sRAGE isoforms and energy expenditure was independent of HbA1c, suggesting that the relation was unrelated to glycemia. Conclusions This study demonstrates a novel link between RAGE and energy expenditure in human participants undergoing weight loss.This trial was registered at clinicaltrials.gov as NCT03336411.
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Affiliation(s)
- Collin J Popp
- Center for Healthful Behavior Change, Department of Population Health, New York University Langone Health, New York, NY, USA
| | - Boyan Zhou
- Division of Biostatistics, Department of Population Health, New York University Langone Health, New York, NY, USA
| | - Michaele B Manigrasso
- Diabetes Research Program, Department of Medicine, New York University Langone Health, New York, NY, USA
| | - Huilin Li
- Division of Biostatistics, Department of Population Health, New York University Langone Health, New York, NY, USA
| | - Margaret Curran
- Center for Healthful Behavior Change, Department of Population Health, New York University Langone Health, New York, NY, USA
| | - Lu Hu
- Center for Healthful Behavior Change, Department of Population Health, New York University Langone Health, New York, NY, USA
| | - David E St-Jules
- Department of Nutrition, University of Nevada, Reno, Reno, NV, USA
| | - José O Alemán
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, New York University Langone Health, New York, NY, USA
| | - Sally M Vanegas
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, New York University Langone Health, New York, NY, USA
| | - Melanie Jay
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, New York University Langone Health, New York, NY, USA
| | - Michael Bergman
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, New York University Langone Health, New York, NY, USA
| | - Eran Segal
- Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, Israel
| | - Mary A Sevick
- Center for Healthful Behavior Change, Department of Population Health, New York University Langone Health, New York, NY, USA
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, New York University Langone Health, New York, NY, USA
| | - Ann M Schmidt
- Diabetes Research Program, Department of Medicine, New York University Langone Health, New York, NY, USA
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Valentine JM, Ahmadian M, Keinan O, Abu-Odeh M, Zhao P, Zhou X, Keller MP, Gao H, Yu RT, Liddle C, Downes M, Zhang J, Lusis AJ, Attie AD, Evans RM, Rydén M, Saltiel AR. β3-Adrenergic receptor downregulation leads to adipocyte catecholamine resistance in obesity. J Clin Invest 2022; 132:e153357. [PMID: 34847077 PMCID: PMC8759781 DOI: 10.1172/jci153357] [Citation(s) in RCA: 50] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 11/17/2021] [Indexed: 11/17/2022] Open
Abstract
The dysregulation of energy homeostasis in obesity involves multihormone resistance. Although leptin and insulin resistance have been well characterized, catecholamine resistance remains largely unexplored. Murine β3-adrenergic receptor expression in adipocytes is orders of magnitude higher compared with that of other isoforms. While resistant to classical desensitization pathways, its mRNA (Adrb3) and protein expression are dramatically downregulated after ligand exposure (homologous desensitization). β3-Adrenergic receptor downregulation also occurs after high-fat diet feeding, concurrent with catecholamine resistance and elevated inflammation. This downregulation is recapitulated in vitro by TNF-α treatment (heterologous desensitization). Both homologous and heterologous desensitization of Adrb3 were triggered by induction of the pseudokinase TRIB1 downstream of the EPAC/RAP2A/PI-PLC pathway. TRIB1 in turn degraded the primary transcriptional activator of Adrb3, CEBPα. EPAC/RAP inhibition enhanced catecholamine-stimulated lipolysis and energy expenditure in obese mice. Moreover, adipose tissue expression of genes in this pathway correlated with body weight extremes in a cohort of genetically diverse mice and with BMI in 2 independent cohorts of humans. These data implicate a signaling axis that may explain reduced hormone-stimulated lipolysis in obesity and resistance to therapeutic interventions with β3-adrenergic receptor agonists.
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Affiliation(s)
| | | | | | | | | | - Xin Zhou
- Department of Pharmacology, Bioengineering, Chemistry, and Biochemistry, UCSD, San Diego, California, USA
| | - Mark P. Keller
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Hui Gao
- Department of Medicine (H7), Karolinska Institutet, Karolinska University Hospital, Huddinge, Stockholm, Sweden
| | - Ruth T. Yu
- Gene Expression Laboratory, Salk Institute for Biological Sciences, La Jolla, California, USA
| | - Christopher Liddle
- Storr Liver Centre, Westmead Institute for Medical Research and Sydney School of Medicine, University of Sydney, Westmead, New South Wales, Australia
| | - Michael Downes
- Gene Expression Laboratory, Salk Institute for Biological Sciences, La Jolla, California, USA
| | - Jin Zhang
- Department of Pharmacology, Bioengineering, Chemistry, and Biochemistry, UCSD, San Diego, California, USA
| | - Aldons J. Lusis
- Department of Microbiology, Immunology, and Molecular Genetics, Department of Medicine, UCLA, Los Angeles, California, USA
| | - Alan D. Attie
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Ronald M. Evans
- Gene Expression Laboratory, Salk Institute for Biological Sciences, La Jolla, California, USA
| | - Mikael Rydén
- Department of Medicine (H7), Karolinska Institutet, Karolinska University Hospital, Huddinge, Stockholm, Sweden
| | - Alan R. Saltiel
- Department of Medicine and
- Department of Pharmacology, Bioengineering, Chemistry, and Biochemistry, UCSD, San Diego, California, USA
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29
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Koehler K, Drenowatz C. Editorial: Understanding the Interaction Between Physical Activity and Diet for the Promotion of Health and Fitness. Front Nutr 2022; 8:835535. [PMID: 35096953 PMCID: PMC8792386 DOI: 10.3389/fnut.2021.835535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 12/20/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
- Karsten Koehler
- Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany
- *Correspondence: Karsten Koehler
| | - Clemens Drenowatz
- Division of Sport, Physical Activity and Health, University of Education Upper Austria, Linz, Austria
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Bhatia R, Holtan S, Jurdi NE, Prizment A, Blaes A. Do Cancer and Cancer Treatments Accelerate Aging? Curr Oncol Rep 2022; 24:1401-1412. [PMID: 35796942 PMCID: PMC9606015 DOI: 10.1007/s11912-022-01311-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/31/2022] [Indexed: 01/27/2023]
Abstract
PURPOSE OF REVIEW This review focuses on describing the mechanisms and clinical manifestations that underlie accelerated aging associated with cancer and its treatment. RECENT FINDINGS The direct and indirect effects of cancer and its treatment are associated with late occurrence of comorbidities that happen earlier or more frequently in cancer survivors compared to cancer-free individuals, otherwise known as accelerated aging. Use of senolytics and dietary and exercise interventions including prehabilitation, caloric restriction, and rehabilitation are currently under investigation to reverse or decelerate the aging process and will be covered in this review. Further research on how to decelerate or reverse aging changes associated with cancer and its treatment will be of paramount importance as the number of cancer survivors continues to grow.
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Affiliation(s)
- Roma Bhatia
- grid.38142.3c000000041936754XMassachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA 02114 USA
| | - Shernan Holtan
- grid.17635.360000000419368657Division of Hematology, Oncology and Transplantation, University of Minnesota, 425 E River Pkwy, Minneapolis, MN 55455 USA
| | - Najla El Jurdi
- grid.17635.360000000419368657Division of Hematology, Oncology and Transplantation, University of Minnesota, 425 E River Pkwy, Minneapolis, MN 55455 USA
| | - Anna Prizment
- grid.17635.360000000419368657Division of Hematology, Oncology and Transplantation, University of Minnesota, 425 E River Pkwy, Minneapolis, MN 55455 USA
| | - Anne Blaes
- grid.17635.360000000419368657Division of Hematology, Oncology and Transplantation, University of Minnesota, 425 E River Pkwy, Minneapolis, MN 55455 USA
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31
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Roberts SB, Anton S, Dao MC. Weight Loss Strategies. Handb Exp Pharmacol 2022; 274:331-348. [PMID: 35624229 DOI: 10.1007/164_2022_580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Lifestyle interventions for weight loss combine support for changing diet and physical activity with weight management education and are considered the first line treatment for obesity. A variety of diet-focused interventions including time-restricted eating are also increasingly being promoted for weight management. This chapter reviews different types of interventions for weight management, their underlying health behavior change models, and effectiveness to date in randomized trials. The results justify increasing efforts to improve program effectiveness generally, and to personalize interventions to support long-term adherence. The high prevalence of obesity worldwide, combined with the known increase in risk of non-communicable diseases with duration of excess weight, provides a compelling justification for routine delivery of effective weight management interventions in the community and in clinical care.
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Affiliation(s)
- Susan B Roberts
- Gerald J. and Dorothy R. Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA.
| | - Stephen Anton
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Maria C Dao
- Department of Agriculture, Nutrition, and Food Systems, University of New Hampshire, Durham, NH, USA
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Fanning J, Rejeski WJ, Leng I, Barnett C, Lovato JF, Lyles MF, Nicklas BJ. Intervening on exercise and daylong movement for weight loss maintenance in older adults: A randomized, clinical trial. Obesity (Silver Spring) 2022; 30:85-95. [PMID: 34932885 PMCID: PMC8711609 DOI: 10.1002/oby.23318] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 09/20/2021] [Accepted: 09/21/2021] [Indexed: 01/03/2023]
Abstract
OBJECTIVE This study aimed to determine the impact of dietary weight loss (WL) plus aerobic exercise (EX) and a "move more, more often" approach to activity promotion (SitLess; SL) on WL and maintenance. METHODS Low-active older adults (age 65-86 years) with obesity were randomized to WL+EX, WL+SL, or WL+EX+SL. Participants received a social-cognitive group-mediated behavioral WL program for 6 months, followed by a 12-month maintenance period. EX participants received guided walking exercise with the goal of walking 150 min/wk. SL attempted to achieve a step goal by moving frequently during the day. The primary outcome was body weight at 18 months, with secondary outcomes including weight regain from 6 to 18 months and objectively assessed physical activity and sedentary behavior at each time point. RESULTS All groups demonstrated significant WL over 6 months (p < 0.001), with no group differences. Groups that received SL improved total activity time (p ≤ 0.05), and those who received EX improved moderate-to-vigorous activity time (p = 0.003). Over the 12-month follow-up period, those who received WL+EX demonstrated greater weight regain (5.2 kg; 95% CI: 3.5-6.9) relative to WL+SL (2.4 kg; 95% CI: 0.8-4.0). CONCLUSIONS Pairing dietary WL with a recommendation to accumulate physical activity contributed to similar WL and less weight regain compared with traditional aerobic exercise.
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Affiliation(s)
- Jason Fanning
- Department of Health and Exercise Science, Wake Forest University, Winston-Salem, North Carolina, USA
| | - W Jack Rejeski
- Department of Health and Exercise Science, Wake Forest University, Winston-Salem, North Carolina, USA
| | - Iris Leng
- Department of Biostatistics and Data Science, Wake Forest School of Medicine, Wake Forest University, Winston-Salem, North Carolina, USA
| | - Cheyenne Barnett
- Department of Internal Medicine, Wake Forest School of Medicine, Wake Forest University, Winston-Salem, North Carolina, USA
| | - James F Lovato
- Department of Biostatistics and Data Science, Wake Forest School of Medicine, Wake Forest University, Winston-Salem, North Carolina, USA
| | - Mary F Lyles
- Department of Internal Medicine, Wake Forest School of Medicine, Wake Forest University, Winston-Salem, North Carolina, USA
| | - Barbara J Nicklas
- Department of Internal Medicine, Wake Forest School of Medicine, Wake Forest University, Winston-Salem, North Carolina, USA
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Martin A, Fox D, Murphy CA, Hofmann H, Koehler K. Tissue losses and metabolic adaptations both contribute to the reduction in resting metabolic rate following weight loss. Int J Obes (Lond) 2022; 46:1168-1175. [PMID: 35181758 PMCID: PMC9151388 DOI: 10.1038/s41366-022-01090-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 01/29/2022] [Accepted: 02/02/2022] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To characterize the contributions of the loss of energy-expending tissues and metabolic adaptations to the reduction in resting metabolic rate (RMR) following weight loss. METHODS A secondary analysis was conducted on data from the Comprehensive Assessment of Long-term Effects of Reducing Intake of Energy study. Changes in RMR, body composition, and metabolic hormones were examined over 12 months of calorie restriction in 109 individuals. The contribution of tissue losses to the decline in RMR was determined by weighing changes in the size of energy-expending tissues and organs (skeletal muscle, adipose tissue, bone, brain, inner organs, residual mass) assessed by dual-energy X-ray absorptiometry with their tissue-specific metabolic rates. Metabolic adaptations were quantified as the remaining reduction in RMR. RESULTS RMR was reduced by 101 ± 12 kcal/d as participants lost 7.3 ± 0.2 kg (both p < 0.001). On average, 60% of the total reduction in RMR were explained by energy-expending tissues losses, while 40% were attributed to metabolic adaptations. The loss of skeletal muscle mass (1.0 ± 0.7 kg) was not significantly related to RMR changes (r = 0.14, p = 0.16), whereas adipose tissue losses (7.2 ± 3.0 kg) were positively associated with the reduction in RMR (r = 0.42, p < 0.001) and metabolic adaptations (r = 0.31, p < 0.001). Metabolic adaptations were correlated with declines in leptin (r = 0.27, p < 0.01), triiodothyronine (r = 0.19, p < 0.05), and insulin (r = 0.25, p < 0.05). CONCLUSIONS During weight loss, tissue loss and metabolic adaptations both contribute to the reduction in RMR, albeit variably. Contrary to popularly belief, it is not skeletal muscle, but rather adipose tissue losses that seem to drive RMR reductions following weight loss. Future research should target personalized strategies addressing the predominant cause of RMR reduction for weight maintenance.
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Affiliation(s)
- Alexandra Martin
- grid.6936.a0000000123222966Department of Sport and Health Sciences, Technical University Munich, Munich, Germany
| | - Darius Fox
- grid.24434.350000 0004 1937 0060Department of Nutrition and Health Sciences, University of Nebraska-Lincoln, Lincoln, NE USA
| | - Chaise A. Murphy
- grid.6936.a0000000123222966Department of Sport and Health Sciences, Technical University Munich, Munich, Germany
| | - Hande Hofmann
- grid.6936.a0000000123222966Department of Sport and Health Sciences, Technical University Munich, Munich, Germany
| | - Karsten Koehler
- grid.6936.a0000000123222966Department of Sport and Health Sciences, Technical University Munich, Munich, Germany
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34
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Christensen RAG, Kirkham AA. Time-Restricted Eating: A Novel and Simple Dietary Intervention for Primary and Secondary Prevention of Breast Cancer and Cardiovascular Disease. Nutrients 2021; 13:3476. [PMID: 34684476 PMCID: PMC8537890 DOI: 10.3390/nu13103476] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 09/28/2021] [Accepted: 09/28/2021] [Indexed: 12/20/2022] Open
Abstract
There is substantial overlap in risk factors for the pathogenesis and progression of breast cancer (BC) and cardiovascular disease (CVD), including obesity, metabolic disturbances, and chronic inflammation. These unifying features remain prevalent after a BC diagnosis and are exacerbated by BC treatment, resulting in elevated CVD risk among survivors. Thus, therapies that target these risk factors or mechanisms are likely to be effective for the prevention or progression of both conditions. In this narrative review, we propose time-restricted eating (TRE) as a simple lifestyle therapy to address many upstream causative factors associated with both BC and CVD. TRE is simple dietary strategy that typically involves the consumption of ad libitum energy intake within 8 h, followed by a 16-h fast. We describe the feasibility and safety of TRE and the available evidence for the impact of TRE on metabolic, cardiovascular, and cancer-specific health benefits. We also highlight potential solutions for overcoming barriers to adoption and adherence and areas requiring future research. In composite, we make the case for the use of TRE as a novel, safe, and feasible intervention for primary and secondary BC prevention, as well as tertiary prevention as it relates to CVD in BC survivors.
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Affiliation(s)
| | - Amy A. Kirkham
- Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, ON M5S 2C9, Canada
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35
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Association between the FTO rs9939609 single nucleotide polymorphism and dietary adherence during a 2-year caloric restriction intervention: Exploratory analyses from CALERIE™ phase 2. Exp Gerontol 2021; 155:111555. [PMID: 34543722 DOI: 10.1016/j.exger.2021.111555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 08/20/2021] [Accepted: 09/09/2021] [Indexed: 01/15/2023]
Abstract
Caloric restriction (CR) improves markers of aging in humans; but it is not known if the fat mass and obesity-associated gene (FTO) rs9939609 single nucleotide polymorphism (SNP), which is associated with appetite and energy intake, influences adherence to prolonged CR. Utilizing data from the two-year Comprehensive Assessment of Long-term Effects of Reducing Intake of Energy (CALERIE™) phase 2 randomized controlled trial, we tested whether the FTO rs9939609 SNP was associated with adherence to CR in healthy adults without obesity. As secondary aims, we assessed whether the FTO rs9939609 SNP was associated with changes in body composition, biomarkers of aging, and eating behaviors. Participants were randomized into either a CR group that targeted a 25% reduction in energy intake compared to the habitual energy intake at baseline, or an ad libitum (AL) control group. Participants were genotyped for the FTO rs9939609 SNP. Dietary adherence was determined through changes in energy intake using doubly labeled water and changes in body composition at baseline, month 12, and month 24 in both the CR and AL condition. Weight, body composition, resting metabolic rate (RMR), adiponectin, insulin, leptin, and eating behaviors were measured at the same timepoints. A total of 144 participants (91 CR and 53 AL, age: 38.6 ± 7.1 years; body mass index: 25.3 ± 1.7 kg/m2) were studied. Of these, 27 were homozygous for the 'obesity-risk' A allele (AA), while 44 were homozygous for the T allele (TT) and 73 were heterozygotes (AT). By design, the CR group exhibited greater percent CR compared to the AL group during the trial (P < 0.01), but no genotype-by-treatment interaction was observed for change in energy intake or percent CR (P ≥ 0.40). The FTO rs9939609 SNP was also negligibly associated with change in most other endpoints (P ≥ 0.13), though AAs showed a reduction in RMR adjusted for body composition change over the 24 months relative to TTs (genotype-by-treatment interaction: P = 0.03). In a two-year CR intervention delivered to healthy individuals without obesity, the FTO rs9939609 SNP was not associated with adherence to CR and did not alter improvements in most aging biomarkers.
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36
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Fanning J, Brooks AK, Hsieh KL, Kershner K, Furlipa J, Nicklas BJ, Rejeski WJ. Building on Lessons Learned in a Mobile Intervention to Reduce Pain and Improve Health (MORPH): Protocol for the MORPH-II Trial. JMIR Res Protoc 2021; 10:e29013. [PMID: 34279241 PMCID: PMC8329761 DOI: 10.2196/29013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/24/2021] [Accepted: 05/25/2021] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND Engaging in sufficient levels of physical activity, guarding against sustained sitting, and maintaining a healthy body weight represent important lifestyle strategies for managing older adults' chronic pain. Our first Mobile Health Intervention to Reduce Pain and Improve Health (MORPH) randomized pilot study demonstrated that a partially remote group-mediated diet and daylong activity intervention (ie, a focus on moving often throughout the day) can lead to improved physical function, weight loss, less pain intensity, and fewer minutes of sedentary time. We also identified unique delivery challenges that limited the program's scalability and potential efficacy. OBJECTIVE The purpose of the MORPH-II randomized pilot study is to refine the MORPH intervention package based on feedback from MORPH and evaluate the feasibility, acceptability, and preliminary efficacy of this revised package prior to conducting a larger clinical trial. METHODS The MORPH-II study is an iteration on MORPH designed to pilot a refined framework, enhance scalability through fully remote delivery, and increase uptake of the daylong movement protocol through revised education content and additional personalized remote coaching. Older, obese, and low-active adults with chronic multisite pain (n=30) will be randomly assigned to receive a 12-week remote group-mediated physical activity and dietary weight loss intervention followed by a 12-week maintenance period or a control condition. Those in the intervention condition will partake in weekly social cognitive theory-based group meetings via teleconference software plus one-on-one support calls on a tapered schedule. They will also engage with a tablet application paired with a wearable activity monitor and smart scale designed to provide ongoing social and behavioral support throughout the week. Those in the control group will receive only the self-monitoring tools. RESULTS Recruitment is ongoing as of January 2021. CONCLUSIONS Findings from MORPH-II will help guide other researchers working to intervene on sedentary behavior through frequent movement in older adults with chronic pain. TRIAL REGISTRATION ClinicalTrials.gov NCT04655001; https://clinicaltrials.gov/ct2/show/NCT04655001. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID) PRR1-10.2196/29013.
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Affiliation(s)
- Jason Fanning
- Department of Health and Exercise Science, Wake Forest University, Winston-Salem, NC, United States
| | - Amber K Brooks
- Wake Forest School of Medicine, Winston-Salem, NC, United States
| | | | - Kyle Kershner
- Department of Health and Exercise Science, Wake Forest University, Winston-Salem, NC, United States
| | - Joy Furlipa
- Department of Health and Exercise Science, Wake Forest University, Winston-Salem, NC, United States
| | | | - W Jack Rejeski
- Department of Health and Exercise Science, Wake Forest University, Winston-Salem, NC, United States
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37
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Templeman I, Smith HA, Chowdhury E, Chen YC, Carroll H, Johnson-Bonson D, Hengist A, Smith R, Creighton J, Clayton D, Varley I, Karagounis LG, Wilhelmsen A, Tsintzas K, Reeves S, Walhin JP, Gonzalez JT, Thompson D, Betts JA. A randomized controlled trial to isolate the effects of fasting and energy restriction on weight loss and metabolic health in lean adults. Sci Transl Med 2021; 13:13/598/eabd8034. [PMID: 34135111 DOI: 10.1126/scitranslmed.abd8034] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 01/22/2021] [Accepted: 05/10/2021] [Indexed: 12/15/2022]
Abstract
Intermittent fasting may impart metabolic benefits independent of energy balance by initiating fasting-mediated mechanisms. This randomized controlled trial examined 24-hour fasting with 150% energy intake on alternate days for 3 weeks in lean, healthy individuals (0:150; n = 12). Control groups involved a matched degree of energy restriction applied continuously without fasting (75% energy intake daily; 75:75; n = 12) or a matched pattern of fasting without net energy restriction (200% energy intake on alternate days; 0:200; n = 12). Primary outcomes were body composition, components of energy balance, and postprandial metabolism. Daily energy restriction (75:75) reduced body mass (-1.91 ± 0.99 kilograms) almost entirely due to fat loss (-1.75 ± 0.79 kilograms). Restricting energy intake via fasting (0:150) also decreased body mass (-1.60 ± 1.06 kilograms; P = 0.46 versus 75:75) but with attenuated reductions in body fat (-0.74 ± 1.32 kilograms; P = 0.01 versus 75:75), whereas fasting without energy restriction (0:200) did not significantly reduce either body mass (-0.52 ± 1.09 kilograms; P ≤ 0.04 versus 75:75 and 0:150) or fat mass (-0.12 ± 0.68 kilograms; P ≤ 0.05 versus 75:75 and 0:150). Postprandial indices of cardiometabolic health and gut hormones, along with the expression of key genes in subcutaneous adipose tissue, were not statistically different between groups (P > 0.05). Alternate-day fasting less effectively reduces body fat mass than a matched degree of daily energy restriction and without evidence of fasting-specific effects on metabolic regulation or cardiovascular health.
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Affiliation(s)
- Iain Templeman
- Centre for Nutrition, Exercise and Metabolism, Department for Health, University of Bath, Bath BA2 7AY, UK
| | - Harry Alex Smith
- Centre for Nutrition, Exercise and Metabolism, Department for Health, University of Bath, Bath BA2 7AY, UK
| | - Enhad Chowdhury
- Centre for Nutrition, Exercise and Metabolism, Department for Health, University of Bath, Bath BA2 7AY, UK
| | - Yung-Chih Chen
- Centre for Nutrition, Exercise and Metabolism, Department for Health, University of Bath, Bath BA2 7AY, UK.,Department of Physical Education, National Taiwan Normal University, Taipei City 106, Taiwan
| | - Harriet Carroll
- Centre for Nutrition, Exercise and Metabolism, Department for Health, University of Bath, Bath BA2 7AY, UK.,Cardiovascular Research-Hypertension, Clinical Research Centre, Lund University, Malmö 221 00, Sweden
| | - Drusus Johnson-Bonson
- Centre for Nutrition, Exercise and Metabolism, Department for Health, University of Bath, Bath BA2 7AY, UK
| | - Aaron Hengist
- Centre for Nutrition, Exercise and Metabolism, Department for Health, University of Bath, Bath BA2 7AY, UK
| | - Rowan Smith
- Centre for Nutrition, Exercise and Metabolism, Department for Health, University of Bath, Bath BA2 7AY, UK
| | - Jade Creighton
- Centre for Nutrition, Exercise and Metabolism, Department for Health, University of Bath, Bath BA2 7AY, UK.,School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK
| | - David Clayton
- School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK
| | - Ian Varley
- School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK
| | - Leonidas Georgios Karagounis
- Nestlé Health Science, Translation Research, Avenue Nestlé 55, CH-1800 Vevey, Switzerland.,Institute of Social and Preventive Medicine, University of Bern, 3012 Bern, Switzerland
| | - Andrew Wilhelmsen
- MRC Versus Arthritis Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, Nottingham NG7 2UH, UK
| | - Kostas Tsintzas
- MRC Versus Arthritis Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, Nottingham NG7 2UH, UK
| | - Sue Reeves
- Department of Life Sciences, University of Roehampton, London SW15 4JD, UK
| | - Jean-Philippe Walhin
- Centre for Nutrition, Exercise and Metabolism, Department for Health, University of Bath, Bath BA2 7AY, UK
| | - Javier Thomas Gonzalez
- Centre for Nutrition, Exercise and Metabolism, Department for Health, University of Bath, Bath BA2 7AY, UK
| | - Dylan Thompson
- Centre for Nutrition, Exercise and Metabolism, Department for Health, University of Bath, Bath BA2 7AY, UK
| | - James Alexander Betts
- Centre for Nutrition, Exercise and Metabolism, Department for Health, University of Bath, Bath BA2 7AY, UK.
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Teong XT, Hutchison AT, Liu B, Wittert GA, Lange K, Banks S, Heilbronn LK. Eight weeks of intermittent fasting versus calorie restriction does not alter eating behaviors, mood, sleep quality, quality of life and cognitive performance in women with overweight. Nutr Res 2021; 92:32-39. [PMID: 34274552 DOI: 10.1016/j.nutres.2021.06.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 05/09/2021] [Accepted: 06/14/2021] [Indexed: 10/21/2022]
Abstract
Human trials that compare intermittent fasting (IF) to calorie restriction (CR) with psychological, behavioral and cognition outcomes are limited. We hypothesized that there would be no difference between CR and IF on perceived eating behaviors, mood, sleep quality, quality of life (QOL) and cognition in women with overweight and obesity. In this prespecified secondary analysis of an open-label, single center, parallel assignment, randomized controlled trial, healthy women with overweight or obesity (N = 46, mean [SD] age 50 [9] years, BMI 32.9 [4.4] kg/m2), without a diagnosed eating disorder and who were randomized into 2 weight loss groups (prescribed 70% of calculated energy requirements as IF or CR) were included. Measurements were assessed in both IF and CR groups following a 12-hour overnight fast during baseline and week 8 and additionally following a 24-hour fast in the IF group only at week 8. We observed that IF produced greater weight and body fat loss than CR (P < .001). We did not detect any statistical difference between groups for the change in dietary restraint, disinhibition, hunger, mood, sleep quality, and QOL. An increase in cognitive performance was found in both IF (P = .036) and CR (P = .006) groups in one of the cognitive tasks, but there was no statistical difference between groups. Perceived eating behaviors, mood, sleep quality and cognitive performance were not changed by an acute 24-hour fast within the IF group (all P > .05). IF may be a viable alternative to CR for weight loss, in the short-term, without adversely impacting eating behaviors, mood, sleep quality, QOL or cognition in healthy women with overweight or obesity. However, larger and long term trials are required.
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Affiliation(s)
- Xiao Tong Teong
- Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia; Lifelong Health Theme, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, South Australia, Australia
| | - Amy T Hutchison
- Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia; Lifelong Health Theme, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, South Australia, Australia
| | - Bo Liu
- Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia; Lifelong Health Theme, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, South Australia, Australia
| | - Gary A Wittert
- Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia; Lifelong Health Theme, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, South Australia, Australia
| | - Kylie Lange
- Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia
| | - Siobhan Banks
- Behavior-Brain-Body Research Centre, University of South Australia, Adelaide, South Australia, Australia
| | - Leonie K Heilbronn
- Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia; Lifelong Health Theme, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, South Australia, Australia.
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39
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Davis AE, Smyers ME, Beltz L, Mehta DM, Britton SL, Koch LG, Novak CM. Differential weight loss with intermittent fasting or daily calorie restriction in low- and high-fitness phenotypes. Exp Physiol 2021; 106:1731-1742. [PMID: 34086376 DOI: 10.1113/ep089434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 06/02/2021] [Indexed: 11/08/2022]
Abstract
NEW FINDINGS What is the central question of this study? How does intrinsic aerobic capacity impact weight loss with 50% daily caloric restriction and alternate-day fasting? What is the main finding and its importance? Intermittent fasting is effective for weight loss in rats with low fitness, which highlights the importance of how intermittent fasting interacts with aerobic fitness. ABSTRACT Recent interest has focused on the benefits of time-restricted feeding strategies, including intermittent fasting, for weight loss. It is not yet known whether intermittent fasting is more effective than daily caloric restriction at stimulating weight loss and how each is subject to individual differences. Here, rat models of leanness and obesity, artificially selected for intrinsically high (HCR) and low (LCR) aerobic capacity, were subjected to intermittent fasting and 50% calorie restrictive diets in two separate experiments using male rats. The lean, high-fitness HCR and obesity-prone, low-fitness LCR rats underwent 50% caloric restriction while body weight and composition were monitored. The low-fitness LCR rats were better able to retain lean mass than the high-fitness HCR rats, without significantly different proportional loss of weight or fat. In a separate experiment using intermittent fasting in male HCR and LCR rats, alternate-day fasting induced significantly greater loss of weight and fat mass in LCR compared with HCR rats, although the HCR rats had a more marked reduction in ad libitum daily food intake. Altogether, this suggests that intermittent fasting is an effective weight-loss strategy for those with low intrinsic aerobic fitness; however, direct comparison of caloric restriction and intermittent fasting is warranted to determine any differential effects on energy expenditure in lean and obesity-prone phenotypes.
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Affiliation(s)
- Ashley E Davis
- School of Biomedical Sciences, Kent State University, Kent, Ohio, USA
| | - Mark E Smyers
- School of Biomedical Sciences, Kent State University, Kent, Ohio, USA
| | - Lisa Beltz
- Department of Biological Sciences, Kent State University, Kent, Ohio, USA
| | - Devanshi M Mehta
- Department of Biological Sciences, Kent State University, Kent, Ohio, USA
| | - Steven L Britton
- Department of Anesthesiology, University of Michigan, Ann Arbor, Michigan, USA.,Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Lauren G Koch
- Department of Physiology and Pharmacology, The University of Toledo College of Medicine and Life Sciences, Toledo, Ohio, USA
| | - Colleen M Novak
- School of Biomedical Sciences, Kent State University, Kent, Ohio, USA.,Department of Biological Sciences, Kent State University, Kent, Ohio, USA
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40
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Evaluation of Measured Resting Metabolic Rate for Dietary Prescription in Ageing Adults with Overweight and Adiposity-Based Chronic Disease. Nutrients 2021; 13:nu13041229. [PMID: 33917778 PMCID: PMC8068182 DOI: 10.3390/nu13041229] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 04/02/2021] [Accepted: 04/06/2021] [Indexed: 01/15/2023] Open
Abstract
The primary objective of this study was to compare weight changes in two groups of ageing Irish adults with overweight and adiposity-based chronic disease: participants who had dietary energy requirements prescribed on the base of measured RMR and participants whose RMR was estimated by a prediction equation. Fifty-four Caucasian adults (male n = 25; female n = 29, age 57.5 ± 6.3 years, weight 90.3 ± 15.1 kg, height 171.5 ± 9.5 cm, BMI 30.7 ± 4.6 kg/m2) were randomly assigned to a dietary intervention with energy prescription based on either measured RMR or estimated RMR. RMR was measured by indirect calorimetry after an overnight fast and predicted values were determined by the Mifflin et al. (1990) prediction equation. All participants received individual nutritional counselling, motivational interviewing and educational material. Anthropometric variables, blood pressure, blood glucose and blood lipid profile were assessed over 12 weeks. Body weight at week 12 was significantly lower (p < 0.05) for both groups following dietary interventions, mRMR: −4.2%; eRMR: −3.2% of initial body weight. There was no significant difference in weight loss between groups. Overall, 20.8% mRMR and 17.4% of eRMR participants experienced clinically meaningful (i.e., ≥5% of initial weight) weight reduction. Weight reduction in adults aged ≥50 years over the short term (12 weeks) favoured a reduction in blood pressure, triglycerides and glucose, thus reducing cardiovascular disease risk factors. This research indicates that employing a reduced-calorie diet using indirect calorimetry to determine energy needs when improving weight outcomes in adults (>50 years) with overweight and adiposity-based chronic disease is equal to employing a reduced-calorie diet based on the Mifflin et al. (1990) prediction equation. A reduced-energy diet based on mRMR or eRMR facilitates clinically meaningful weight reduction in adults (≥50 years) over the short term (12 weeks) and favours a reduction in blood pressure, triglycerides and glucose, thus reducing cardiovascular disease risk factors. Moreover, the addition of motivational interviewing and behaviour change techniques that support and encourage small behaviour changes is effective in short-term weight management.
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Berthoud HR, Seeley RJ, Roberts SB. Physiology of Energy Intake in the Weight-Reduced State. Obesity (Silver Spring) 2021; 29 Suppl 1:S25-S30. [PMID: 33759396 DOI: 10.1002/oby.23080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 10/28/2020] [Accepted: 11/09/2020] [Indexed: 11/09/2022]
Abstract
Physiological adaptations to intentional weight loss can facilitate weight regain. This review summarizes emerging findings on hypothalamic and brainstem circuitry in the regulation of body weight and identifies promising areas for research to improve therapeutic interventions for sustainable weight loss. There is good evidence that body weight is actively regulated in a homeostatic fashion similar to other physiological parameters. However, the defended level of body weight is not fixed but rather depends on environmental conditions and genetic background in an allostatic fashion. In an environment with plenty of easily available energy-dense food and low levels of physical activity, prone individuals develop obesity. In a majority of individuals with obesity, body weight is strongly defended through counterregulatory mechanisms, such as hunger and hypometabolism, making weight loss challenging. Among the options for treatment or prevention of obesity, those directly changing the defended body weight would appear to be the most effective ones. There is strong evidence that the mediobasal hypothalamus is a master sensor of the metabolic state and an integrator of effector actions responsible for the defense of adequate body weight. However, other brain areas, such as the brainstem and limbic system, are also increasingly implicated in body weight defense mechanisms and may thus be additional targets for successful therapies.
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Affiliation(s)
- Hans-Rudolf Berthoud
- Neurobiology of Nutrition and Metabolism Department, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, Louisiana, USA
| | - Randy J Seeley
- Department of Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Susan B Roberts
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts, USA
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Abstract
Adaptive thermogenesis (AT) has been proposed to be a compensatory response that may resist weight loss (WL) and promote weight regain. This systematic review examined the existence of AT in adults after a period of negative energy balance (EB) with or without a weight stabilisation phase. Studies published until 15 May 2020 were identified from PubMed, Cochrane Library, EMBASE, MEDLINE, SCOPUS and Web of Science. Inclusion criteria included statistically significant WL, observational with follow-up or experimental studies, age > 18y, sample size ≥10 participants, intervention period ≥ 1week, published in English, objective measures of total daily energy expenditure (EE) (TDEE), resting EE (REE) and sleeping EE(SEE). The systematic review was registered at PROSPERO (2020 CRD42020165348). A total of thirty-three studies comprising 2528 participants were included. AT was observed in twenty-seven studies. Twenty-three studies showed significant values for AT for REE (82·8 %), four for TDEE (80·0 %) and two for SEE (100 %). A large heterogeneity in the methods used to quantify AT and between subjects and among studies regarding the magnitude of WL and/or of AT was reported. Well-designed studies reported lower or non-significant values for AT. These findings suggest that although WL may lead to AT in some of the EE components, these values may be small or non-statistically significant when higher-quality methodological designs are used. Furthermore, AT seems to be attenuated, or non-existent, after periods of weight stabilisation/neutral EB. More high-quality studies are warranted not only to disclose the existence of AT but also to understand its clinical implications on weight management outcomes.
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Nachmani M, Lahav Y, Zeev A, Grosman-Rimon L, Eilat-Adar S. Weight change adjusted equations for assessing resting metabolic rate in overweight and obese adults. Obes Res Clin Pract 2021; 15:221-226. [PMID: 33773945 DOI: 10.1016/j.orcp.2021.03.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 02/05/2021] [Accepted: 03/01/2021] [Indexed: 02/01/2023]
Abstract
BACKGROUND Although over one hundred equations have been developed to predict the energy expenditure of individuals, none are sensitive to weight change in assessment of resting metabolic rate (RMR) before and after weight loss. OBJECTIVE To formulate adjusted equations for overweight and obese individuals and to compare their accuracy with existing prediction RMR equations before and after weight loss. SUBJECTS/MATERIALS This is historical prospective study. Participants included 39 overweight and obese men and women before and after losing 10-20% from baseline weight on a diet and physical activity regimen for at least three months. Pre and post weight loss measured RMR results were compared to estimated RMR using several existing prediction equations: Harris and Benedict, Ravussin and Bogardus, and Mifflin et al. To improve the accuracy of these prediction equations, we suggest new equations adjusted for weight loss, based on measured RMR and evaluated their accuracy. RESULTS Pre and post weight loss data indicated: significant fat reduction in both genders; reduction in free-fat mass only in men, and a significant decrease in measured RMR only in women. Our suggested equations were the most accurate and closest to measured RMR in both genders, in comparison to the Harris and Benedict, Ravussin and Bogardus, and Mifflin et al equation results. Estimated RMR using the latter equations was significantly lower than measured RMR in both genders at pre and post weight loss (P < 0.01). CONCLUSIONS This study highlights the need for adjusting RMR equations before and after weight loss in overweight and obese individuals. Further research is needed to validate our suggested equations.
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Affiliation(s)
- Moran Nachmani
- Graduate School, The Academic College at Wingate, The Wingate Institute, Netanya, Israel
| | - Yair Lahav
- Department of Epidemiology and Preventive Medicine, School of Public Health, Sackler Faculty of Medicine and Sylvan Adams Sports Institute, Tel Aviv University, Tel Aviv, Israel
| | - Aviva Zeev
- Graduate School, The Academic College at Wingate, The Wingate Institute, Netanya, Israel
| | - Liza Grosman-Rimon
- Graduate School, The Academic College at Wingate, The Wingate Institute, Netanya, Israel; Cardiovascular Department and Research Center, Baruch Padeh Medical Center, Poriya, Tiberias, Israel
| | - Sigal Eilat-Adar
- Graduate School, The Academic College at Wingate, The Wingate Institute, Netanya, Israel.
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Eriau E, Paillet J, Kroemer G, Pol JG. Metabolic Reprogramming by Reduced Calorie Intake or Pharmacological Caloric Restriction Mimetics for Improved Cancer Immunotherapy. Cancers (Basel) 2021; 13:cancers13061260. [PMID: 33809187 PMCID: PMC7999281 DOI: 10.3390/cancers13061260] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/27/2021] [Accepted: 03/08/2021] [Indexed: 12/11/2022] Open
Abstract
Caloric restriction and fasting have been known for a long time for their health- and life-span promoting effects, with coherent observations in multiple model organisms as well as epidemiological and clinical studies. This holds particularly true for cancer. The health-promoting effects of caloric restriction and fasting are mediated at least partly through their cellular effects-chiefly autophagy induction-rather than reduced calorie intake per se. Interestingly, caloric restriction has a differential impact on cancer and healthy cells, due to the atypical metabolic profile of malignant tumors. Caloric restriction mimetics are non-toxic compounds able to mimic the biochemical and physiological effects of caloric restriction including autophagy induction. Caloric restriction and its mimetics induce autophagy to improve the efficacy of some cancer treatments that induce immunogenic cell death (ICD), a type of cellular demise that eventually elicits adaptive antitumor immunity. Caloric restriction and its mimetics also enhance the therapeutic efficacy of chemo-immunotherapies combining ICD-inducing agents with immune checkpoint inhibitors targeting PD-1. Collectively, preclinical data encourage the application of caloric restriction and its mimetics as an adjuvant to immunotherapies. This recommendation is subject to confirmation in additional experimental settings and in clinical trials. In this work, we review the preclinical and clinical evidence in favor of such therapeutic interventions before listing ongoing clinical trials that will shed some light on this subject.
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Affiliation(s)
- Erwan Eriau
- Centre de Cancérologie de Lyon, Université de Lyon, UMR Inserm 1052 CNRS 5286, Centre Léon Bérard, 69008 Lyon, France; or
- Ecole Normale Supérieure de Lyon, 69342 Lyon, France
- Centre de Recherche des Cordeliers, Equipe 11 labellisée par la Ligue Nationale contre le Cancer, INSERM, Sorbonne Université, Université de Paris, 75006 Paris, France or (J.P.); (G.K.)
- Gustave Roussy Cancer Campus, Metabolomics and Cell Biology Platforms, 94800 Villejuif, France
| | - Juliette Paillet
- Centre de Recherche des Cordeliers, Equipe 11 labellisée par la Ligue Nationale contre le Cancer, INSERM, Sorbonne Université, Université de Paris, 75006 Paris, France or (J.P.); (G.K.)
- Gustave Roussy Cancer Campus, Metabolomics and Cell Biology Platforms, 94800 Villejuif, France
- Faculté de Médecine, Université Paris-Saclay, 91190 Kremlin-Bicêtre, France
| | - Guido Kroemer
- Centre de Recherche des Cordeliers, Equipe 11 labellisée par la Ligue Nationale contre le Cancer, INSERM, Sorbonne Université, Université de Paris, 75006 Paris, France or (J.P.); (G.K.)
- Gustave Roussy Cancer Campus, Metabolomics and Cell Biology Platforms, 94800 Villejuif, France
- Faculté de Médecine, Université Paris-Saclay, 91190 Kremlin-Bicêtre, France
- Institut Universitaire de France, 75005 Paris, France
- Pôle de Biologie, Hôpital Européen Georges Pompidou, Assistance Publique–Hôpitaux de Paris (AP-HP), 75015 Paris, France
- Suzhou Institute for Systems Medicine, Chinese Academy of Sciences, Suzhou 215163, China
- Department of Women’s and Children’s Health, Karolinska University Hospital, 17164 Stockholm, Sweden
| | - Jonathan G. Pol
- Centre de Recherche des Cordeliers, Equipe 11 labellisée par la Ligue Nationale contre le Cancer, INSERM, Sorbonne Université, Université de Paris, 75006 Paris, France or (J.P.); (G.K.)
- Gustave Roussy Cancer Campus, Metabolomics and Cell Biology Platforms, 94800 Villejuif, France
- Faculté de Médecine, Université Paris-Saclay, 91190 Kremlin-Bicêtre, France
- Correspondence: or ; Tel.: +33-1-44-27-76-66
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Stubbs RJ, Turicchi J. From famine to therapeutic weight loss: Hunger, psychological responses, and energy balance-related behaviors. Obes Rev 2021; 22 Suppl 2:e13191. [PMID: 33527688 DOI: 10.1111/obr.13191] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 12/07/2020] [Indexed: 12/18/2022]
Abstract
Understanding physiological and behavioral responses to energy imbalances is important for the management of overweight/obesity and undernutrition. Changes in body composition and physiological functions associated with energy imbalances provide the structural and functional context in which to consider psychological and behavioral responses. Compensatory changes in physiology and behavior are more pronounced in response to negative than positive energy balances. The physiological and psychological impact of weight loss (WL) occur on a continuum determined by (i) the degree of energy deficit (ED), (ii) its duration, (iii) body composition at the onset of the energy deficit, and (iv) the psychosocial environment in which it occurs. Therapeutic WL and famine/semistarvation both involve prolonged EDs, which are sometimes similar in magnitude. The key differences are that (i) the body mass index (BMI) of most famine victims is lower at the onset of the ED, (ii) therapeutic WL is intentional and (iii) famines are typically longer in duration (partly due to the voluntary nature of therapeutic WL and disengagement with WL interventions). The changes in psychological outcomes, motivation to eat, and energy intake in therapeutic WL are often modest (bearing in mind the nature of the measures used) and can be difficult to detect but are quantitatively significant over time. As WL progresses, these changes become more marked. It appears that extensive WL beyond 10%-20% in lean individuals has profound effects on body composition and physiological function. At this level of WL, there is a marked erosion of psychological functioning, which appears to run in parallel to WL. Psychological resources dwindle and become increasingly focused on alleviating escalating hunger and food seeking behavior. Functional changes in fat-free mass, characterized by catabolism of skeletal muscle and organs may be involved in the drive to eat associated with semistarvation. Higher levels of body fat mass may act as a buffer to protect fat-free mass, functional integrity and limit compensatory changes in energy balance behaviors. The increase in appetite that accompanies therapeutic WL appears to be very different to the intense and all-consuming drive to eat that occurs during prolonged semistarvation. The mechanisms may also differ but are not well understood, and longitudinal comparisons of the relationship between body structure, function, and behavior in response to differing EDs in those with higher and lower BMIs are currently lacking.
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Affiliation(s)
- R James Stubbs
- School of Psychology, Faculty of Medicine and Health, University of Leeds, Leeds, UK
| | - Jake Turicchi
- School of Psychology, Faculty of Medicine and Health, University of Leeds, Leeds, UK
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Development and validation of prognostic models to estimate body weight loss in overweight and obese people. NUTR HOSP 2021; 38:511-518. [PMID: 33764152 DOI: 10.20960/nh.03425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
Introduction Background: predicting weight loss outcomes from information collected from subjects before they start a weight management program is an objective strongly pursued by scientists who study energy balance. Objective: to develop and validate two prognostic models for the estimation of final body weight after a six-month intervention period. Material and methods: the present work was developed following the TRIPOD standard to report prognostic multivariable prediction models. A multivariable linear regression analysis was applied to 70 % of participants to identify the most relevant variables and develop the best prognostic model for body weight estimation. Then, 30 % of the remaining sample was used to validate the model. The study involved a 6-month intervention based on 25-30 % caloric restriction and exercise. A total of 239 volunteers who had participated in the PRONAF study, aged 18 to 50 years, with overweight or obesity (body mass index: 25-34.9 kg/m2), were enrolled. Body composition was estimated by dual-energy X-ray absorptiometry (DXA) and by hand-to-foot bioelectrical impedance (BIA) analysis. Results: prognostic models were developed and validated with a high correlation (0.954 and 0.951 for DXA and BIA, respectively), with the paired t-tests showing no significant differences between estimated and measured body weights. The mean difference, standard error, and 95 % confidence interval of the DXA model were 0.067 ± 0.547 (-1.036-1.170), and those of the BIA model were -0.105 ± 0.511 (-1.134-0.924). Conclusions: the models developed in this work make it possible to calculate the final BW of any participant engaged in an intervention like the one employed in this study based only on baseline body composition variables.
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Cui Y, Cai T, Zhou Z, Mu Y, Lu Y, Gao Z, Wu J, Zhang Y. Health Effects of Alternate-Day Fasting in Adults: A Systematic Review and Meta-Analysis. Front Nutr 2020; 7:586036. [PMID: 33330587 PMCID: PMC7732631 DOI: 10.3389/fnut.2020.586036] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 10/21/2020] [Indexed: 12/11/2022] Open
Abstract
Background: Alternate-day fasting (ADF) method is becoming more and more popular among adults. This meta-analysis aims to evaluate the effects of ADF on adults. Methods: Randomized controlled trials (RCTs) of ADF were searched using PubMed (1988 to March 2020), EMBASE (1995 to March 2020), and the Cochrane Controlled Trials Register. A systematic review was carried out using the Preferred Reporting Items for Systematic Reviews and Meta-analyses. The datum was calculated by RevMan version 5.3.0. The original references for relating articles were also reviewed. Results: Seven randomized controlled trials involving 269 participants (152 in the ADF group and 117 in the control group) were studied. In this meta-analysis, compared with the control group, the ADF group showed statistically significant reductions in weight (p < 0.00001) and body mass index (p < 0.00001). Besides, the ADF group showed significant differences in terms of total cholesterol (p = 0.001), low-density lipoprotein (p = 0.01), triglycerides (p = 0.02), fat mass (p = 0.002), lean mass (p = 0.002), systolic blood pressure (p = 0.003), diastolic blood pressure (p = 0.007), and total calorie intake (p = 0.007). At the same time, the analysis demonstrated that the ADF group had a same effect compared with control group in aspects of high-density lipoprotein (p = 0.27), homeostasis model assessment-insulin resistance (p = 0.55), and fasting blood sugar (p = 0.09). Conclusions: This meta-analysis suggests that ADF is a viable diet strategy for weight loss, and it has a substantial improvement in risk indicators for diseases in obese or normal people.
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Affiliation(s)
- Yuanshan Cui
- Department of Urology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, China.,Department of Urology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
| | - Tong Cai
- Department of Urology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, China.,Binzhou Medical University, Yantai, China
| | - Zhongbao Zhou
- Department of Urology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
| | - Yingmei Mu
- Department of Allergy, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, China
| | - Youyi Lu
- Department of Urology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, China
| | - Zhenli Gao
- Department of Urology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, China
| | - Jitao Wu
- Department of Urology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, China
| | - Yong Zhang
- Department of Urology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
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McDougal DH, Marlatt KL, Beyl RA, Redman LM, Ravussin E. A Novel Approach to Assess Metabolic Flexibility Overnight in a Whole-Body Room Calorimeter. Obesity (Silver Spring) 2020; 28:2073-2077. [PMID: 32985108 PMCID: PMC7644592 DOI: 10.1002/oby.22982] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 07/15/2020] [Accepted: 07/16/2020] [Indexed: 02/04/2023]
Abstract
OBJECTIVE This study aimed to investigate a novel approach for determining the effects of energy-standardized dinner meals (high-fat and low-fat) on respiratory exchange ratio (RER) dynamics and metabolic flexibility. METHODS Using a randomized crossover study design, energy expenditure, RER, and macronutrient oxidation rates were assessed in response to a single dinner meal during an overnight stay in a whole-body room calorimeter. Eight healthy adults completed two overnight chamber stays while fed either a high-fat (60% fat, 20% carbohydrate [CHO], 20% protein; food quotient [FQ] = 0.784) or low-fat (20% fat, 60% CHO, 20% protein; FQ = 0.899) dinner containing 40% of daily energy requirements. RESULTS Following the low-fat meal, CHO oxidation first increased before decreasing, resulting in a 12-hour RER:FQ ratio close to 1.0 (0.986 ± 0.019, P = 0.06) and therefore resulting in a 12-hour equilibrated fat balance (29 ± 76 kcal/12 hours). Following the high-fat meal, participants had a RER:FQ ratio above 1.0 (1.061 ± 0.017, P < 0.01), resulting in a significant positive 12-hour fat balance of 376 ± 142 kcal/12 hours. Various RER trajectory parameters were significantly different following the high-fat and low-fat meals. CONCLUSIONS This proof-of-concept study provides an alternative approach to quantify metabolic flexibility in response to a high-fat dinner and it can be used to derive indexes of metabolic flexibility, such as the 12-hour RER:FQ ratio or the 12-hour fat balance.
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Affiliation(s)
| | - Kara L. Marlatt
- Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
| | - Robbie A. Beyl
- Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
| | - Leanne M. Redman
- Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
| | - Eric Ravussin
- Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
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Kuryłowicz A, Puzianowska-Kuźnicka M. Induction of Adipose Tissue Browning as a Strategy to Combat Obesity. Int J Mol Sci 2020; 21:ijms21176241. [PMID: 32872317 PMCID: PMC7504355 DOI: 10.3390/ijms21176241] [Citation(s) in RCA: 112] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/24/2020] [Accepted: 08/26/2020] [Indexed: 12/25/2022] Open
Abstract
The ongoing obesity pandemic generates a constant need to develop new therapeutic strategies to restore the energy balance. Therefore, the concept of activating brown adipose tissue (BAT) in order to increase energy expenditure has been revived. In mammals, two developmentally distinct types of brown adipocytes exist; the classical or constitutive BAT that arises during embryogenesis, and the beige adipose tissue that is recruited postnatally within white adipose tissue (WAT) in the process called browning. Research of recent years has significantly increased our understanding of the mechanisms involved in BAT activation and WAT browning. They also allowed for the identification of critical molecules and critical steps of both processes and, therefore, many new therapeutic targets. Several non-pharmacological approaches, as well as chemical compounds aiming at the induction of WAT browning and BAT activation, have been tested in vitro as well as in animal models of genetically determined and/or diet-induced obesity. The therapeutic potential of some of these strategies has also been tested in humans. In this review, we summarize present concepts regarding potential therapeutic targets in the process of BAT activation and WAT browning and available strategies aiming at them.
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Affiliation(s)
- Alina Kuryłowicz
- Department of Human Epigenetics, Mossakowski Medical Research Centre PAS, 02-106 Warsaw, Poland;
- Correspondence: ; Tel.: +48-226086591; Fax: +48-226086410
| | - Monika Puzianowska-Kuźnicka
- Department of Human Epigenetics, Mossakowski Medical Research Centre PAS, 02-106 Warsaw, Poland;
- Department of Geriatrics and Gerontology, Medical Centre of Postgraduate Education, 01-826 Warsaw, Poland
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Developing evidence-based behavioural strategies to overcome physiological resistance to weight loss in the general population. Proc Nutr Soc 2020; 78:576-589. [PMID: 31670628 DOI: 10.1017/s0029665119001083] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Physiological and behavioural systems are tolerant of excess energy intake and responsive to energy deficits. Weight loss (WL) changes body structure, physiological function and energy balance (EB) behaviours, which resist further WL and promote subsequent weight regain. Measuring and understanding the response of EB systems to energy deficits is important for developing evidence-based behaviour change interventions for longer-term weight management. Currently, behaviour change approaches for longer-term WL show modest effect sizes. Self-regulation of EB behaviours (e.g. goal setting, action plans, self-monitoring, relapse prevention plans) and aspects of motivation are important for WL maintenance. Stress management, emotion regulation and food hedonics may also be important for relapse prevention, but the evidence is less concrete. Although much is known about the effects of WL on physiological and psychological function, little is known about the way these dynamic changes affect human EB behaviours. Key areas of future importance include (i) improved methods for detailed tracking of energy expenditure, balance and by subtraction intake, using digital technologies, (ii) how WL impacts body structure, function and subsequent EB behaviours, (iii) how behaviour change approaches can overcome physiological resistance to WL and (iv) who is likely to maintain WL or relapse. Modelling physiological and psychological moderators and mediators of EB-related behaviours is central to understanding and improving longer-term weight and health outcomes in the general population.
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