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Suthutvoravut U, Anothaisintawee T, Boonmanunt S, Pramyothin S, Siriyothin S, Attia J, McKay GJ, Reutrakul S, Thakkinstian A. Efficacy of Time-Restricted Eating and Behavioral Economic Intervention in Reducing Fasting Plasma Glucose, HbA1c, and Cardiometabolic Risk Factors in Patients with Impaired Fasting Glucose: A Randomized Controlled Trial. Nutrients 2023; 15:4233. [PMID: 37836517 PMCID: PMC10574576 DOI: 10.3390/nu15194233] [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: 09/08/2023] [Revised: 09/22/2023] [Accepted: 09/24/2023] [Indexed: 10/15/2023] Open
Abstract
This randomized controlled trial is aimed at assessing the efficacy of combining time-restricted eating (TRE) with behavioral economic (BE) interventions and comparing it to TRE alone and to the usual care for reducing fasting plasma glucose (FPG), hemoglobin A1c (HbA1c), and other cardiometabolic risk factors among patients with impaired fasting glucose (IFG). Seventy-two IFG patients aged 18-65 years were randomly allocated for TRE with BE interventions (26 patients), TRE alone (24 patients), or usual care (22 patients). Mean FPG, HbA1c, and other cardiometabolic risk factors among the three groups were compared using a mixed-effect linear regression analysis. Mean body weight, FPG, HbA1c, fasting insulin, and lipid profiles did not significantly differ among the three groups. When considering only patients who were able to comply with the TRE protocol, the TRE group showed significantly lower mean FPG, HbA1c, and fasting insulin levels compared to the usual care group. Our results did not show significant differences in body weight, blood sugar, fasting insulin, or lipid profiles between TRE plus BE interventions, TRE alone, and usual care groups. However, TRE might be an effective intervention in lowering blood sugar levels for IFG patients who were able to adhere to the TRE protocol.
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Affiliation(s)
- Unyaporn Suthutvoravut
- Department of Family Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand;
| | - Thunyarat Anothaisintawee
- Department of Family Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand;
- Department of Clinical Epidemiology and Biostatistics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand; (S.B.); (S.S.); (A.T.)
| | - Suparee Boonmanunt
- Department of Clinical Epidemiology and Biostatistics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand; (S.B.); (S.S.); (A.T.)
| | - Sarunporn Pramyothin
- Medical Services Division, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand;
| | - Sukanya Siriyothin
- Department of Clinical Epidemiology and Biostatistics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand; (S.B.); (S.S.); (A.T.)
| | - John Attia
- School of Medicine and Public Health, University of Newcastle, Callaghan, NSW 2308, Australia;
| | - Gareth J. McKay
- Centre for Public Health, School of Medicine, Dentistry, and Biomedical Sciences, Queen’s University Belfast, Belfast BT9 7BL, UK;
| | - Sirimon Reutrakul
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, University of Illinois Chicago, Chicago, IL 60612, USA;
| | - Ammarin Thakkinstian
- Department of Clinical Epidemiology and Biostatistics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand; (S.B.); (S.S.); (A.T.)
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Hershey MS, Chang CR, Sotos-Prieto M, Fernandez-Montero A, Cash SB, Christophi CA, Folta SC, Muegge C, Kleinschmidt V, Moffatt S, Mozaffarian D, Kales SN. Effect of a Nutrition Intervention on Mediterranean Diet Adherence Among Firefighters: A Cluster Randomized Clinical Trial. JAMA Netw Open 2023; 6:e2329147. [PMID: 37589978 PMCID: PMC10436136 DOI: 10.1001/jamanetworkopen.2023.29147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 07/09/2023] [Indexed: 08/18/2023] Open
Abstract
Importance US firefighters are a working population at risk of chronic diseases, including obesity, cardiovascular disease, and cancer. This risk may be mitigated by a healthy diet. Objective To evaluate the effect of a Mediterranean nutrition intervention using a behavioral/environmental approach (firefighter/fire station/home) at the individual participant level. Design, Setting, and Participants This 12-month cluster randomized clinical trial included US career firefighters from fire stations and homes within 2 Indiana fire departments. Participants were randomized by fire station to either Mediterranean diet or control (usual care). The study was conducted from October 2016 to December 2019, and data were analyzed in November 2022. Intervention For the first 12 months of the study, firefighters located at fire stations randomized to the intervention group were provided with access to supermarket discounts and free samples of Mediterranean diet foods, online nutrition education platforms, email announcements and reminders, family and peer education and support, and chef demonstrations. Firefighters in fire stations allocated to the control group received no intervention and were instructed to follow their usual diet. Main Outcomes and Measures Change in dietary habits at 12 months as measured by a modified Mediterranean diet score (range, 0 to 51 points) at baseline and 6-month and 12-month follow-up. Cardiometabolic parameters were secondary outcomes. Results Of 485 included firefighters, 458 (94.4%) were male, and the mean (SD) age was 47 (7.5) years. A total of 241 firefighters (27 fire stations) were randomized to the Mediterranean nutrition intervention, and 244 (25 fire stations) were randomized to usual diet. Outcomes were analyzed using generalized linear mixed models for modified Mediterranean diet score at 6 months (n = 336) and 12 months (n = 260), adjusting for baseline age, sex, race and ethnicity, fire department, physical activity, and waist circumference. In the intervention group compared with the control group, the modified Mediterranean diet score significantly increased by 2.01 points (95% CI, 0.62-3.40; P = .005) at 6 months and by 2.67 points (95% CI, 1.14-4.20; P = .001) at 12 months. Among secondary outcomes, changes in cardiometabolic risk factors were not statistically significant at 1 year. Results from analyses with multilevel multiple imputation for missingness were similar. Conclusions and Relevance In this Mediterranean nutrition intervention of multicomponent behavioral/environmental changes, career firefighters had increased adherence to a Mediterranean diet. Trial Registration ClinicalTrials.gov Identifier: NCT02941757.
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Affiliation(s)
- Maria Soledad Hershey
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Chia-Rui Chang
- Department of Biostatistics, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Mercedes Sotos-Prieto
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
- Department of Preventive Medicine and Public Health, School of Medicine, Universidad Autónoma de Madrid, Madrid, Spain
- Centro de Investigación Biomédica en Red of Epidemiology and Public Health, Madrid, Spain
- Campus of International Excellence (CEI) Universidad Autónoma de Madrid (UAM), Spanish National Research Council (CSIC), Madrid, Spain
| | - Alejandro Fernandez-Montero
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
- Department of Occupational Medicine, University of Navarra, Pamplona, Spain
- Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain
| | - Sean B. Cash
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, Massachusetts
| | - Costas A. Christophi
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
- Cyprus International Institute for Environmental and Public Health, Cyprus University of Technology, Lemesos, Cyprus
| | - Sara C. Folta
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, Massachusetts
| | - Carolyn Muegge
- National Institute for Public Safety Health, Indianapolis, Indiana
| | | | - Steven Moffatt
- National Institute for Public Safety Health, Indianapolis, Indiana
| | - Dariush Mozaffarian
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, Massachusetts
| | - Stefanos N. Kales
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
- Occupational Medicine, Cambridge Hospital, Harvard Medical School, Cambridge, Massachusetts
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Li X, Sun Z. Circadian clock and temporal meal pattern. MEDICAL REVIEW (2021) 2023; 3:85-101. [PMID: 37724110 PMCID: PMC10471112 DOI: 10.1515/mr-2022-0021] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 08/02/2022] [Indexed: 09/20/2023]
Abstract
The central circadian clock in the brain controls the time-of-the-day variations in acute meal responses, with a low glycemic response but a high satiety/thermogenic response to meals consumed at waking compared to other time points. Consistently, studies show that consuming a significant proportion of calories, particularly carbohydrates, in breakfast is beneficial for the chronic management of obesity and its associated metabolic syndrome, compared to consuming identical meals at dinner. Conversely, breakfast skipping or/and late dinner can have unfavorable metabolic outcomes. It remains controversial how meal frequency affects metabolic health. In contrast, irregular meals, especially irregular breakfasts, show consistent adverse metabolic consequences. Time-restricted feeding (TRF), with all calories consumed within less than 12-h per day, can improve metabolism and extend lifespan. A major component of TRF in humans is caloric restriction, which contributes significantly to the beneficial effects of TRF in humans. By comparison, TRF effects in rodents can be independent of caloric restriction and show day/night phase specificity. TRF could alleviate metabolic abnormalities due to circadian disruption, but its effects appear independent of the circadian clock in rodents. Understanding neuroendocrine mechanisms underlying clock-mediated metabolic regulation will shed light on the metabolic effects of temporal meal patterns.
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Affiliation(s)
- Xin Li
- Department of Medicine – Endocrinology, Diabetes, and Metabolism, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Zheng Sun
- Department of Medicine – Endocrinology, Diabetes, and Metabolism, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
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Manoogian ENC, Zadourian A, Lo HC, Gutierrez NR, Shoghi A, Rosander A, Pazargadi A, Ormiston CK, Wang X, Sui J, Hou Z, Fleischer JG, Golshan S, Taub PR, Panda S. Feasibility of time-restricted eating and impacts on cardiometabolic health in 24-h shift workers: The Healthy Heroes randomized control trial. Cell Metab 2022; 34:1442-1456.e7. [PMID: 36198291 PMCID: PMC9536325 DOI: 10.1016/j.cmet.2022.08.018] [Citation(s) in RCA: 62] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 05/05/2022] [Accepted: 08/23/2022] [Indexed: 12/19/2022]
Abstract
Over a quarter of the workforce in industrialized countries does shift work, which increases the risk for cardiometabolic disease. Yet shift workers are often excluded from lifestyle intervention studies to reduce this risk. In a randomized control trial with 137 firefighters who work 24-h shifts (23-59 years old, 9% female), 12 weeks of 10-h time-restricted eating (TRE) was feasible, with TRE participants decreasing their eating window (baseline, mean 14.13 h, 95% CI 13.78-14.47 h; intervention, 11.13 h, 95% CI 10.73-11.54 h, p = 3.29E-17) with no adverse effects, and improved quality of life assessed via SF-36 (ClinicalTrials.gov: NCT03533023). Compared to the standard of care (SOC) arm, TRE significantly decreased VLDL particle size. In participants with elevated cardiometabolic risks at baseline, there were significant reductions in TRE compared to SOC in glycated hemoglobin A1C and diastolic blood pressure. For individuals working a 24-h shift schedule, TRE is feasible and can improve cardiometabolic health, especially for individuals with increased risk. VIDEO ABSTRACT.
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Affiliation(s)
- Emily N C Manoogian
- Regulatory Biology, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Adena Zadourian
- Division of Cardiovascular Medicine, Department of Medicine, University of California, San Diego, San Diego, CA 92037, USA
| | - Hannah C Lo
- Division of Cardiovascular Medicine, Department of Medicine, University of California, San Diego, San Diego, CA 92037, USA
| | - Nikko R Gutierrez
- Regulatory Biology, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Azarin Shoghi
- Regulatory Biology, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Ashley Rosander
- Division of Cardiovascular Medicine, Department of Medicine, University of California, San Diego, San Diego, CA 92037, USA
| | - Aryana Pazargadi
- Division of Cardiovascular Medicine, Department of Medicine, University of California, San Diego, San Diego, CA 92037, USA
| | - Cameron K Ormiston
- Division of Cardiovascular Medicine, Department of Medicine, University of California, San Diego, San Diego, CA 92037, USA
| | - Xinran Wang
- Regulatory Biology, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Jialu Sui
- Regulatory Biology, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Zhaoyi Hou
- Regulatory Biology, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Jason G Fleischer
- Department of Cognitive Science, University of California, San Diego, San Diego, CA 92037, USA
| | - Shahrokh Golshan
- Department of Psychiatry, University of California, San Diego, San Diego, CA 92037, USA
| | - Pam R Taub
- Division of Cardiovascular Medicine, Department of Medicine, University of California, San Diego, San Diego, CA 92037, USA.
| | - Satchidananda Panda
- Regulatory Biology, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA.
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Suthutvoravut U, Anothaisintawee T, Boonmanunt S, Pramyothin S, Chaithanasarn A, Reutrakul S, Thakkinstian A. Efficacy of time-restricted eating and behavioural economic interventions in reducing fasting plasma glucose, HbA1c and cardiometabolic risk factors compared with time-restricted eating alone or usual care in patients with impaired fasting glucose: protocol for an open-label randomised controlled trial. BMJ Open 2022; 12:e058954. [PMID: 36127075 PMCID: PMC9490601 DOI: 10.1136/bmjopen-2021-058954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
INTRODUCTION Impaired fasting glucose (IFG) is a significant risk factor for diabetes mellitus. Time-restricted eating (TRE) is one type of diet showing positive effects on metabolic signal pathways. However, effects of TRE on cardiometabolic risk factors in humans are limited. Additionally, compliance with TRE remains problematic despite having intention to follow the diet control. Therefore, this study aims to investigate the efficacy of TRE with behavioural economic interventions or TRE alone relative to usual care, in reducing fasting plasma glucose (FPG), haemoglobin A1c (HbA1c) and other cardiometabolic risk factors in patients with IFG. METHODS AND ANALYSIS This parallel-group, open-label randomised controlled trial will be conducted at the outpatient clinic of the Department of Family Medicine, Faculty of Medicine, Ramathibodi Hospital, Bangkok, Thailand. Patients aged 18-65 years with IFG defined as FPG 100-125 mg/dL and body mass index ≥25 kg/m2 will be recruited between October 2021 and October 2022. Patients will be randomly allocated to three groups (1:1:1 ratio) as (1) TRE with behavioural economic interventions including financial incentives and text reminders, (2) TRE alone or (3) usual care. The number of participants will be 38 per group (a total of 114). The duration of the intervention will be 12 weeks. Primary outcome is FPG levels measured at 12 weeks after randomisation. Secondary outcomes are HbA1c, body weight, systolic and diastolic blood pressure, fasting insulin, serum triglyceride, total cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol and high-sensitivity C reactive protein. P value of <0.05 of two-sided test will be considered as statistical significance. ETHICS AND DISSEMINATION The study protocol has been approved by the Ethics Committee of the Faculty of Medicine, Ramathibodi Hospital, Mahidol University (MURA2021/389). All patients will be informed about the details of the study and sign written informed consent before enrollment in the study. Results from this study will be published in a peer-reviewed journal. TRIAL REGISTRATION NUMBER TCTR20210520002.
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Affiliation(s)
- Unyaporn Suthutvoravut
- Department of Family Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Thunyarat Anothaisintawee
- Department of Family Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
- Department of Clinical Epidemiology and Biostatistics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Suparee Boonmanunt
- Department of Clinical Epidemiology and Biostatistics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Sarunporn Pramyothin
- Medical Services Devision, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Arthit Chaithanasarn
- Department of Family Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Sirimon Reutrakul
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, University of Illinois, Chicago, Illinois, USA
| | - Ammarin Thakkinstian
- Department of Clinical Epidemiology and Biostatistics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
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Christmas and New Year “Dietary Titbits” and Perspectives from Chronobiology. Nutrients 2022; 14:nu14153177. [PMID: 35956352 PMCID: PMC9370396 DOI: 10.3390/nu14153177] [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: 06/24/2022] [Revised: 07/21/2022] [Accepted: 07/27/2022] [Indexed: 02/06/2023] Open
Abstract
A historical Christmas card connecting two pioneers of modern chronobiology (Colin Pittendrigh and Jürgen Aschoff) brings together key evolutionary facets of the field at Christmas time. The importance of the field to physiology and medicine is conveyed by the Nobel Prize award in 2017 for discoveries of how body clocks facilitate the temporal organization of physiology across days and nights. Temporal organization can have relevance for dietary Christmas excesses and dietary New Year resolutions. Herein, we examine how diet around Christmas and New Year has been targeted in human health research and we examine published opinion on dietary practice concerning Christmas and New Year using a systematized literature review approach. Thereafter, via a selective literature synthesis regarding time-restricted eating, we explore the chronobiological notion that “when” we eat and drink may make differences in terms of whether we experience weight gain and adverse health effects during and after the festive days. Overall, current Christmas eating is typically detrimental to health in terms of “how much” we consume of “what”. Regarding New Year’s goal-setting, chronobiology-based advice could be considered insofar as “when” we eat may be a healthier and more sustainable nutritional habit alternative. While we need further studies in humans, individual and public health may benefit during and after Christmas by adhering to plausible principles of chrononutrition. That detrimental nutritional excesses over Christmas may encourage individuals to tackle their eating habits should not be left untapped.
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Burris JC, Werner CM, Woolf K. The Relationship Between Dietary Intake and Dietary-Focused Lifestyle Interventions on Risk Factors Associated with Cardiovascular Disease in Firefighters. Curr Nutr Rep 2022; 11:206-224. [PMID: 35347666 DOI: 10.1007/s13668-022-00406-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/07/2022] [Indexed: 11/29/2022]
Abstract
PURPOSE OF REVIEW Cardiovascular disease (CVD) is the leading cause of death to on-duty firefighters and is a substantial health concern. Preventative measures, including dietary interventions, may improve CVD in firefighters. The purpose of this review is to examine the literature on the relationship between dietary intake, dietary lifestyle interventions, and risk of CVD in firefighters. RECENT FINDINGS Existing evidence, albeit limited, suggests that firefighters do not meet dietary guidelines. Lifestyle modifications featuring dietary interventions are effective in improving risk factors associated with CVD in firefighters. Unfortunately, no consistent nutrition-related trend was identified across the retrieved studies and only a limited number of randomized controlled trials have examined the efficacy of lifestyle intervention studies on CVD in firefighters. Although this review suggests dietary lifestyle interventions may facilitate decreases in risk factors associated with CVD in firefighters, current evidence is limited, and additional research is needed.
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Affiliation(s)
- Jennifer C Burris
- Department of Nutrition, Saddleback College, 2800 Marguerite Pkwy, Mission Viejo, CA, 92692, USA
| | - Charlotte Marie Werner
- Department of Nutrition and Food Studies, Steinhardt School of Culture, Education, and Human Development, New York University, 411 Lafayette Street, 5th Floor, New York, NY, 10003, USA
| | - Kathleen Woolf
- Department of Nutrition and Food Studies, Steinhardt School of Culture, Education, and Human Development, New York University, 411 Lafayette Street, 5th Floor, New York, NY, 10003, USA.
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A Time to Rest, a Time to Dine: Sleep, Time-Restricted Eating, and Cardiometabolic Health. Nutrients 2022; 14:nu14030420. [PMID: 35276787 PMCID: PMC8840563 DOI: 10.3390/nu14030420] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/14/2022] [Accepted: 01/16/2022] [Indexed: 02/01/2023] Open
Abstract
Cardiovascular disease (CVD) poses a serious health and economic burden worldwide. Modifiable lifestyle factors are a focus of research into reducing the burden of CVD, with diet as one of the most investigated factors. Specifically, the timing and regularity of food intake is an emerging research area, with approaches such as time-restricted eating (TRE) receiving much attention. TRE involves shortening the time available to eat across the day and is associated with improved CVD outcomes compared with longer eating windows. However, studies that have examined TRE have not considered the impact of sleep on CVD outcomes despite recent evidence showing that sleep duration can influence the timing and amount of food eaten. In this article, we argue that as TRE and sleep influence each other, and influence the same cardiometabolic parameters, experiencing inadequate sleep may attenuate any positive impact TRE has on CVD. We examine the relationship between TRE and CVD, with sleep as a potential mediator in this relationship, and propose a research agenda to investigate this relationship. This will provide necessary evidence to inform future interventions aimed at reducing the burden of CVD.
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