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Ruple BA, Vann CG, Sexton CL, Osburn SC, Smith MA, Godwin JS, Mumford PW, Stock MS, Roberts MD, Young KC. Peripheral quantitative computed tomography is a valid imaging technique for tracking changes in skeletal muscle cross-sectional area. Clin Physiol Funct Imaging 2024; 44:407-414. [PMID: 38666415 DOI: 10.1111/cpf.12885] [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: 09/22/2023] [Revised: 04/08/2024] [Accepted: 04/15/2024] [Indexed: 08/07/2024]
Abstract
Peripheral quantitative computed tomography (pQCT) has recently expanded to quantifying skeletal muscle, however its validity to determine muscle cross-sectional area (mCSA) compared to magnetic resonance imaging (MRI) is unknown. Eleven male participants (age: 22 ± 3 y) underwent pQCT and MRI dual-leg mid-thigh imaging before (PRE) and after (POST) 6 weeks of resistance training for quantification of mid-thigh mCSA and change in mCSA. mCSA agreement at both time points and absolute change in mCSA across time was assessed using Bland-Altman plots for mean bias and 95% limits of agreement (LOA), as well as Lin's concordance correlation coefficients (CCC). Both pQCT and MRI mCSA increased following 6 weeks of resistance training (∆mCSApQCT: 6.7 ± 5.4 cm2, p < 0.001; ∆mCSAMRI: 6.0 ± 6.4 cm2, p < 0.001). Importantly, the change in mCSA was not different between methods (p = 0.39). Bland-Altman analysis revealed a small mean bias (1.10 cm2, LOA: -6.09, 8.29 cm2) where pQCT tended to overestimate mCSA relative to MRI when comparing images at a single time point. Concordance between pQCT and MRI mCSA at PRE and POST was excellent yielding a CCC of 0.982. For detecting changes in mCSA, Bland-Altman analysis revealed excellent agreement between pQCT and MRI (mean bias: -0.73 cm2, LOA: -8.37, 6.91 cm2). Finally, there was excellent concordance between pQCT and MRI mCSA change scores (CCC = 0.779). Relative to MRI, pQCT imaging is a valid technique for measuring both mid-thigh mCSA at a single time point and mCSA changes following a resistance training intervention.
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Affiliation(s)
- Bradley A Ruple
- School of Kinesiology, Auburn University, Auburn, Alabama, USA
| | - Christopher G Vann
- Duke Molecular Physiology Institute, Duke University School of Medicine, Duke University, Durham, North Carolina, USA
| | - Casey L Sexton
- School of Kinesiology, Auburn University, Auburn, Alabama, USA
| | - Shelby C Osburn
- School of Kinesiology, Auburn University, Auburn, Alabama, USA
| | - Morgan A Smith
- School of Kinesiology, Auburn University, Auburn, Alabama, USA
| | - Joshua S Godwin
- School of Kinesiology, Auburn University, Auburn, Alabama, USA
| | - Petey W Mumford
- Department of Kinesiology, Lindenwood University, St. Charles, Missouri, USA
| | - Matt S Stock
- School of Kinesiology and Physical Therapy, University of Central Florida, Orlando, Florida, USA
| | - Michael D Roberts
- School of Kinesiology, Auburn University, Auburn, Alabama, USA
- Edward Via College of Osteopathic Medicine, Auburn, Alabama, USA
| | - Kaelin C Young
- School of Kinesiology, Auburn University, Auburn, Alabama, USA
- College of Osteopathic Medicine, Pacific Northwest University of Health Sciences, Yakima, Washington, USA
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Beausejour JP, Knowles KS, Wilson AT, Mangum LC, Hill EC, Hanney WJ, Wells AJ, Fukuda DH, Stout J, Stock MS. Innovations in the Assessment of Skeletal Muscle Health: A Glimpse into the Future. Int J Sports Med 2024; 45:659-671. [PMID: 38198822 DOI: 10.1055/a-2242-3226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
Skeletal muscle is the largest organ system in the human body and plays critical roles in athletic performance, mobility, and disease pathogenesis. Despite growing recognition of its importance by major health organizations, significant knowledge gaps remain regarding skeletal muscle health and its crosstalk with nearly every physiological system. Relevant public health challenges like pain, injury, obesity, and sarcopenia underscore the need to accurately assess skeletal muscle health and function. Feasible, non-invasive techniques that reliably evaluate metrics including muscle pain, dynamic structure, contractility, circulatory function, body composition, and emerging biomarkers are imperative to unraveling the complexities of skeletal muscle. Our concise review highlights innovative or overlooked approaches for comprehensively assessing skeletal muscle in vivo. We summarize recent advances in leveraging dynamic ultrasound imaging, muscle echogenicity, tensiomyography, blood flow restriction protocols, molecular techniques, body composition, and pain assessments to gain novel insight into muscle physiology from cellular to whole-body perspectives. Continued development of precise, non-invasive tools to investigate skeletal muscle are critical in informing impactful discoveries in exercise and rehabilitation science.
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Affiliation(s)
- Jonathan P Beausejour
- Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, FL, United States
| | - Kevan S Knowles
- Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, FL, United States
| | - Abigail T Wilson
- Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, FL, United States
| | - L Colby Mangum
- Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, FL, United States
| | - Ethan C Hill
- Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, FL, United States
| | - William J Hanney
- Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, FL, United States
| | - Adam J Wells
- Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, FL, United States
| | - David H Fukuda
- Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, FL, United States
| | - JeffreyR Stout
- Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, FL, United States
| | - Matt S Stock
- Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, FL, United States
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Rodriguez C, Mota JD, Palmer TB, Heymsfield SB, Tinsley GM. Skeletal muscle estimation: A review of techniques and their applications. Clin Physiol Funct Imaging 2024; 44:261-284. [PMID: 38426639 DOI: 10.1111/cpf.12874] [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: 01/13/2024] [Accepted: 02/14/2024] [Indexed: 03/02/2024]
Abstract
Quantifying skeletal muscle size is necessary to identify those at risk for conditions that increase frailty, morbidity, and mortality, as well as decrease quality of life. Although muscle strength, muscle quality, and physical performance have been suggested as important assessments in the screening, prevention, and management of sarcopenic and cachexic individuals, skeletal muscle size is still a critical objective marker. Several techniques exist for estimating skeletal muscle size; however, each technique presents with unique characteristics regarding simplicity/complexity, cost, radiation dose, accessibility, and portability that are important factors for assessors to consider before applying these modalities in practice. This narrative review presents a discussion centred on the theory and applications of current non-invasive techniques for estimating skeletal muscle size in diverse populations. Common instruments for skeletal muscle assessment include imaging techniques such as computed tomography, magnetic resonance imaging, peripheral quantitative computed tomography, dual-energy X-ray absorptiometry, and Brightness-mode ultrasound, and non-imaging techniques like bioelectrical impedance analysis and anthropometry. Skeletal muscle size can be acquired from these methods using whole-body and/or regional assessments, as well as prediction equations. Notable concerns when conducting assessments include the absence of standardised image acquisition/processing protocols and the variation in cut-off thresholds used to define low skeletal muscle size by clinicians and researchers, which could affect the accuracy and prevalence of diagnoses. Given the importance of evaluating skeletal muscle size, it is imperative practitioners are informed of each technique and their respective strengths and weaknesses.
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Affiliation(s)
- Christian Rodriguez
- Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, Texas, USA
| | - Jacob D Mota
- Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, Texas, USA
| | - Ty B Palmer
- Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, Texas, USA
| | - Steven B Heymsfield
- Metabolism and Body Composition Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, Louisiana, USA
| | - Grant M Tinsley
- Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, Texas, USA
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Wearing SC, Hooper SL, Langton CM, Keiner M, Horstmann T, Crevier-Denoix N, Pourcelot P. The Biomechanics of Musculoskeletal Tissues during Activities of Daily Living: Dynamic Assessment Using Quantitative Transmission-Mode Ultrasound Techniques. Healthcare (Basel) 2024; 12:1254. [PMID: 38998789 PMCID: PMC11241410 DOI: 10.3390/healthcare12131254] [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: 05/22/2024] [Revised: 06/18/2024] [Accepted: 06/19/2024] [Indexed: 07/14/2024] Open
Abstract
The measurement of musculoskeletal tissue properties and loading patterns during physical activity is important for understanding the adaptation mechanisms of tissues such as bone, tendon, and muscle tissues, particularly with injury and repair. Although the properties and loading of these connective tissues have been quantified using direct measurement techniques, these methods are highly invasive and often prevent or interfere with normal activity patterns. Indirect biomechanical methods, such as estimates based on electromyography, ultrasound, and inverse dynamics, are used more widely but are known to yield different parameter values than direct measurements. Through a series of literature searches of electronic databases, including Pubmed, Embase, Web of Science, and IEEE Explore, this paper reviews current methods used for the in vivo measurement of human musculoskeletal tissue and describes the operating principals, application, and emerging research findings gained from the use of quantitative transmission-mode ultrasound measurement techniques to non-invasively characterize human bone, tendon, and muscle properties at rest and during activities of daily living. In contrast to standard ultrasound imaging approaches, these techniques assess the interaction between ultrasound compression waves and connective tissues to provide quantifiable parameters associated with the structure, instantaneous elastic modulus, and density of tissues. By taking advantage of the physical relationship between the axial velocity of ultrasound compression waves and the instantaneous modulus of the propagation material, these techniques can also be used to estimate the in vivo loading environment of relatively superficial soft connective tissues during sports and activities of daily living. This paper highlights key findings from clinical studies in which quantitative transmission-mode ultrasound has been used to measure the properties and loading of bone, tendon, and muscle tissue during common physical activities in healthy and pathological populations.
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Affiliation(s)
- Scott C. Wearing
- School of Medicine and Health, Technical University of Munich, 80992 Munich, Bavaria, Germany
| | - Sue L. Hooper
- School of Health, University of the Sunshine Coast, Sippy Downs, QLD 4556, Australia
| | - Christian M. Langton
- Griffith Centre of Rehabilitation Engineering, Griffith University, Southport, QLD 4222, Australia
| | - Michael Keiner
- Department of Exercise and Training Science, German University of Health and Sport, 85737 Ismaning, Bavaria, Germany
| | - Thomas Horstmann
- School of Medicine and Health, Technical University of Munich, 80992 Munich, Bavaria, Germany
| | | | - Philippe Pourcelot
- INRAE, BPLC Unit, Ecole Nationale Vétérinaire d’Alfort, 94700 Maisons-Alfort, France
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Verma N, Gupta SK, Patil S, Tiwari S, Mishra AK. Effects of Ashwagandha ( Withania somnifera) standardized root extract on physical endurance and VO 2max in healthy adults performing resistance training: An eight-week, prospective, randomized, double-blind, placebo-controlled study. F1000Res 2024; 12:335. [PMID: 38988644 PMCID: PMC11234080 DOI: 10.12688/f1000research.130932.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/03/2024] [Indexed: 07/12/2024] Open
Abstract
Background Ashwagandha is a well-known Ayurvedic herb used for youthful vigor and wellbeing. This study investigated the effects of 600 mg standardized root extract (>5% withanolides) of Ashwagandha ( Withania somnifera) on muscle size, strength and cardiorespiratory endurance following resistance training. Methods In this eight-week, parallel-group, multicenter, randomized, double-blind, placebo-controlled clinical study, 80 healthy male and female participants aged 18-45 years, who engaged in regular physical activity were randomly allocated in a 1:1 ratio to receive Ashwagandha (AG, n=40) 300 mg capsules twice daily for eight weeks, or identical placebo (PB, n=40). Seven (3 AG, 4 PB) participants were excluded due to poor compliance. All participants conducted eight-week resistance training. Study outcomes included muscle strength (1RM bench press and leg extension), muscle size (circumference of arm, chest and upper thigh) and cardio-respiratory endurance (VO 2max) assessed at baseline and at eight weeks. Analysis of covariance (ANCOVA) was used to estimate adjusted differences based on sex, BMI and chest circumference at baseline. Results AG caused greater improvement in bench press (males: p = 0.0084; females: p = 0.0005), leg press (males: p = 0.0049; females: p = 0.018) and endurance (males: p <0.0001; females: p <0.0001) as compared to PB. Also, greater improvements in muscle girth for arm, chest and thigh were seen in both male and female participants with AG. No adverse events were reported in the study. Conclusions Eight weeks of AG root extract supplementation along with resistance training is effective in improving muscle strength, growth and endurance in both male and female participants. AG root extract could be a safer, effective and low-cost alternative for athletes to improve muscle endurance.
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Affiliation(s)
- Narsingh Verma
- Physiology, King George’s Medical University, Lucknow, Uttar Pradesh, 226003, India
| | - Sandeep Kumar Gupta
- Internal Medicine, M V Hospital and Research Centre, Lucknow, Uttar Pradesh, 226003, India
| | - Sayali Patil
- Pharmacology, D. Y. Patil deemed to be University - School of Medicine, Navi Mumbai, Maharashtra, 400607, India
| | - Shashank Tiwari
- Physiology, King George’s Medical University, Lucknow, Uttar Pradesh, 226003, India
| | - Ashok Kumar Mishra
- Clinical Research, M V Hospital and Research Centre, Lucknow, Uttar Pradesh, 226003, India
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Moreno EN, Hammert WB, Montgomery TR, Abe T, Loenneke JP, Buckner SL. Skeletal muscle mass in competitive physique-based athletes (bodybuilding, 212 bodybuilding, bikini, and physique divisions): A case series. Am J Hum Biol 2024; 36:e23978. [PMID: 37563889 DOI: 10.1002/ajhb.23978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 07/24/2023] [Accepted: 07/31/2023] [Indexed: 08/12/2023] Open
Abstract
OBJECTIVES (1) To examine the muscle thickness of various muscle groups of the body to estimate the absolute and relative skeletal muscle mass (SM) in competitive physique-based athletes (Bodybuilding, 212 Bodybuilding, Bikini, and Physique divisions) and (2) to compare values across various divisions of competition and to resistance trained and non-resistance trained individuals. METHODS Eight competitive physique-based athletes (2 M and 6 F), two recreationally resistance trained (1 M and 1 F) and two non-resistance trained (1 M and 1 F) participants had muscle thickness measured by ultrasound at nine sites on the anterior and posterior aspects of the body. SM was estimated from an ultrasound-derived prediction equation and SM index was used to adjust for the influence of standing height (i.e., divided by height squared). RESULTS SM values ranged from 19.6 to 60.4 kg in the eight competitive physique-based athletes and 16.1 to 32.6 kg in the four recreationally resistance trained and non-resistance trained participants. SM index ranged from 7.2 to 17.9 kg/m2 in the eight competitive physique-based athletes and 5.8 to 9.3 kg/m2 in the four recreationally resistance trained and non-resistance trained participants. CONCLUSION Overall, varying magnitudes of SM and SM index were present across competitors and their respective divisions of bodybuilding. The Men's Open Bodybuilder in the present study had greater values of total SM and SM index compared to previously published values in the literature. Our data provides insight into the extent of SM present in this population and further extends the discussion regarding SM accumulation in humans.
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Affiliation(s)
- Enrique N Moreno
- USF Muscle Laboratory, Exercise Science Program, University of South Florida, Tampa, Florida, USA
| | - William B Hammert
- USF Muscle Laboratory, Exercise Science Program, University of South Florida, Tampa, Florida, USA
- Department of Health, Exercise Science, and Recreation Management, Kevser Ermin Applied Physiology Laboratory, The University of Mississippi, University, Mississippi, USA
| | - Tony R Montgomery
- USF Muscle Laboratory, Exercise Science Program, University of South Florida, Tampa, Florida, USA
- Human Performance Lab, Kinesiology, Applied Health, and Recreation, Oklahoma State University, Stillwater, Oklahoma, USA
| | - Takashi Abe
- Graduate School of Health and Sports Science, Institute of Health and Sports Science & Medicine, Juntendo University, Chiba, Japan
| | - Jeremy P Loenneke
- Department of Health, Exercise Science, and Recreation Management, Kevser Ermin Applied Physiology Laboratory, The University of Mississippi, University, Mississippi, USA
| | - Samuel L Buckner
- USF Muscle Laboratory, Exercise Science Program, University of South Florida, Tampa, Florida, USA
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Minetto MA, Pietrobelli A, Ferraris A, Busso C, Magistrali M, Vignati C, Sieglinger B, Bruner D, Shepherd JA, Heymsfield SB. Equations for smartphone prediction of adiposity and appendicular lean mass in youth soccer players. Sci Rep 2023; 13:20734. [PMID: 38007571 PMCID: PMC10676389 DOI: 10.1038/s41598-023-48055-y] [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: 08/04/2023] [Accepted: 11/21/2023] [Indexed: 11/27/2023] Open
Abstract
Digital anthropometry by three-dimensional optical imaging systems and smartphones has recently been shown to provide non-invasive, precise, and accurate anthropometric and body composition measurements. To our knowledge, no previous study performed smartphone-based digital anthropometric assessments in young athletes. The aim of this study was to investigate the reproducibly and validity of smartphone-based estimation of anthropometric and body composition parameters in youth soccer players. A convenience sample of 124 male players and 69 female players (median ages of 16.2 and 15.5 years, respectively) was recruited. Measurements of body weight and height, one whole-body Dual-Energy X-ray Absorptiometry (DXA) scan, and acquisition of optical images (performed in duplicate by the Mobile Fit app to obtain two avatars for each player) were performed. The reproducibility analysis showed percent standard error of measurement values < 10% for all anthropometric and body composition measurements, thus indicating high agreement between the measurements obtained for the two avatars. Mobile Fit app overestimated the body fat percentage with respect to DXA (average overestimation of + 3.7% in males and + 4.6% in females), while it underestimated the total lean mass (- 2.6 kg in males and - 2.5 kg in females) and the appendicular lean mass (- 10.5 kg in males and - 5.5 kg in females). Using data of the soccer players, we reparameterized the equations previously proposed to estimate the body fat percentage and the appendicular lean mass and we obtained new equations that can be used in youth athletes for body composition assessment through conventional anthropometrics-based prediction models.
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Affiliation(s)
- Marco A Minetto
- Division of Physical Medicine and Rehabilitation, Department of Surgical Sciences, University of Turin, Turin, Italy.
| | - Angelo Pietrobelli
- Pennington Biomedical Research Centre, Baton Rouge, LA, USA
- Department of Surgical Sciences, Dentistry, Gynaecology and Paediatrics, Paediatric Unit, University of Verona, Verona, Italy
| | - Andrea Ferraris
- Division of Physical Medicine and Rehabilitation, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Chiara Busso
- Division of Physical Medicine and Rehabilitation, Department of Surgical Sciences, University of Turin, Turin, Italy
| | | | | | | | | | - John A Shepherd
- Department of Epidemiology, University of Hawaii Cancer Center, Honolulu, HI, USA
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McKendry J, Stokes T, Mcleod JC, Phillips SM. Resistance Exercise, Aging, Disuse, and Muscle Protein Metabolism. Compr Physiol 2021; 11:2249-2278. [PMID: 34190341 DOI: 10.1002/cphy.c200029] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Skeletal muscle is the organ of locomotion, its optimal function is critical for athletic performance, and is also important for health due to its contribution to resting metabolic rate and as a site for glucose uptake and storage. Numerous endogenous and exogenous factors influence muscle mass. Much of what is currently known regarding muscle protein turnover is owed to the development and use of stable isotope tracers. Skeletal muscle mass is determined by the meal- and contraction-induced alterations of muscle protein synthesis and muscle protein breakdown. Increased loading as resistance training is the most potent nonpharmacological strategy by which skeletal muscle mass can be increased. Conversely, aging (sarcopenia) and muscle disuse lead to the development of anabolic resistance and contribute to the loss of skeletal muscle mass. Nascent omics-based technologies have significantly improved our understanding surrounding the regulation of skeletal muscle mass at the gene, transcript, and protein levels. Despite significant advances surrounding the mechanistic intricacies that underpin changes in skeletal muscle mass, these processes are complex, and more work is certainly needed. In this article, we provide an overview of the importance of skeletal muscle, describe the influence that resistance training, aging, and disuse exert on muscle protein turnover and the molecular regulatory processes that contribute to changes in muscle protein abundance. © 2021 American Physiological Society. Compr Physiol 11:2249-2278, 2021.
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Affiliation(s)
- James McKendry
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
| | - Tanner Stokes
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
| | - Jonathan C Mcleod
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
| | - Stuart M Phillips
- Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
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Park HK, Na SM, Choi SL, Seon JK, Do WH. Physiological Effect of Exercise Training with Whole Body Electric Muscle Stimulation Suit on Strength and Balance in Young Women: A Randomized Controlled Trial. Chonnam Med J 2021; 57:76-86. [PMID: 33537223 PMCID: PMC7840343 DOI: 10.4068/cmj.2021.57.1.76] [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: 08/23/2020] [Revised: 10/06/2020] [Accepted: 10/07/2020] [Indexed: 12/18/2022] Open
Abstract
Many studies about Electrical muscle stimulation (EMS) have been performed to determine the effectiveness of EMS. However, most studies enrolled only elderly patients. Moreover, only a few studies have verified the effect of a whole body (WB)-EMS suit on young healthy women. Thus, the main purpose of this study was to verify the physiological effects of exercise training with a WB-EMS suit in young women. During the study periods, 24 young women were randomly assigned into two groups: 1) the WB-EMS training group, and 2) the control. All participants in the two groups performed the same low-intensity resistance exercise three times a week for 6 weeks at a training center. Group 1 used an electric current for WB-EMS suit which was switched on during the exercise period. Outcome measures were body composition, body circumference of hips and abdomen, isokinetic muscle function of knees, balance functions, Magnetic resonance imaging (MRI)s, cardiopulmonary functions, and lipid profiles. All outcomes were measured before and after the exercise protocol over 6 weeks. A total of 23 young women (group 1, n=11; group 2, n=12) completed a 6-week exercise regimen. After exercise, we compared the differences before and after the exercise program in each group. There were significant differences (p≤0.05) in body circumference, cardiopulmonary function in group 1 and 2. In particular, group 1 that activated WB-EMS showed significant differences in the isokinetic muscle function on knee flexors and balance functions. The results of this study show that exercise with a WB-EMS suit can be considered as an effective exercise addition for young women.
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Affiliation(s)
- Hyeng-Kyu Park
- Department of Physical and Rehabilitation Medicine, Chonnam National University Medical School and Hospital, Gwangju, Korea
| | - Seung Min Na
- Center for Joint Diseases, Chonnam National Univerity Bitgoeul Hospital, Chonnam National University Medical School, Hwasun, Korea
| | - Se-Lin Choi
- Department of Clothing and Textiles, Healthcare Ware Research and Business Development Center, Chonnam National University, Gwangju, Korea
| | - Jong-Keun Seon
- Center for Joint Diseases, Chonnam National Univerity Bitgoeul Hospital, Chonnam National University Medical School, Hwasun, Korea
| | - Wol-Hee Do
- Department of Clothing and Textiles, Healthcare Ware Research and Business Development Center, Chonnam National University, Gwangju, Korea
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Granic A, Hurst C, Dismore L, Davies K, Stevenson E, Sayer AA, Aspray T. Milk and resistance exercise intervention to improve muscle function in community-dwelling older adults at risk of sarcopenia (MIlkMAN): protocol for a pilot study. BMJ Open 2019; 9:e031048. [PMID: 31597652 PMCID: PMC6797244 DOI: 10.1136/bmjopen-2019-031048] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
INTRODUCTION Sarcopenia is a progressive muscle disorder characterised by decline in skeletal muscle mass, strength and function leading to adverse health outcomes, including falls, frailty, poor quality of life and death. It occurs more commonly in older people and can be accelerated by poor diet and low physical activity. Intervention studies incorporating higher dietary protein intakes or protein supplementation combined with resistance exercise (RE) have been shown to limit muscle function decline. However, less is known about the role of whole foods in reducing the risk of sarcopenia. Milk is a source of high-quality nutrients, which may be beneficial for skeletal muscle. This pilot study examines the feasibility and acceptability of milk consumption with RE to improve muscle function in community-dwelling older adults at risk of sarcopenia. METHODS AND ANALYSIS 30 older adults aged ≥65 years will be randomly allocated to three groups: 'whole milk+RE', 'skimmed milk+RE' or 'control drink+RE'. Assessments will take place in participants' homes, including screening (milk allergies, grip strength, walking speed), baseline and postintervention health and function. All participants will undertake a structured RE intervention twice a week for 6 weeks at a local gym, followed by the consumption of 500 mL of whole or skimmed milk (each ~20 g of protein) or an isocaloric control drink and another 500 mL at home. Participants' views about the study will be assessed using standardised open-ended questions. The primary outcomes include feasibility and acceptability of the intervention with recruitment, retention and intervention response rates. Analyses will include descriptive statistics, exploration of qualitative themes and intervention fidelity. ETHICS AND DISSEMINATION Outputs include pilot data to support funding applications; public involvement events; presentation at conferences and peer-reviewed publication. TRIAL REGISTRATION NUMBER ISRCTN13398279; Pre-results.
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Affiliation(s)
- Antoneta Granic
- AGE Research Group, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
- Newcastle University Institute for Ageing, Newcastle upon Tyne, UK
- NIHR Biomedical Research Centre, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Christopher Hurst
- AGE Research Group, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
- NIHR Biomedical Research Centre, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Lorelle Dismore
- AGE Research Group, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
- NIHR Biomedical Research Centre, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Karen Davies
- AGE Research Group, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
- Newcastle University Institute for Ageing, Newcastle upon Tyne, UK
- NIHR Biomedical Research Centre, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Emma Stevenson
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
- Human Nutrition Research Centre, Newcastle University, Newcastle upon Tyne, UK
| | - Avan A Sayer
- AGE Research Group, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
- Newcastle University Institute for Ageing, Newcastle upon Tyne, UK
- NIHR Biomedical Research Centre, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Terry Aspray
- NIHR Biomedical Research Centre, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
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Izadi M, Arazi H, Ramirez-Campillo R, Mirzaei M, Saidie P. In-season in-field variable resistance training: effects on strength, power, and anthropometry of junior soccer players. J Sports Med Phys Fitness 2019; 60:220-228. [PMID: 31343149 DOI: 10.23736/s0022-4707.19.09937-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Soccer players' leg muscular strength and power have been shown to be significant due to their association with soccer-specific performance including jumps, sprints, tackles and kicks. The aim of this study, therefore, was to examine the effects of an in-season in-field variable resistance training (VRT) program on strength, power, and anthropometry of junior soccer players. METHODS A team of male soccer players were randomly assigned into Experimental (N.=10) and Control groups (N.=10). The Control group performed 8 weeks of soccer training alone. The Experimental group performed squat VRT using chains in addition to soccer training. Measures before and after training included squat strength, countermovement jump, and anthropometric estimation of thigh muscle cross sectional area (CSA). RESULTS The VRT induced large improvements in absolute (34.45%; P=0.001; Cohen's d=1.78) and relative strength to thigh muscle CSA (21.53%; P=0.002; Cohen's d=1.04). Similarly, there were large (18.07%, P=0.007; Cohen's d=1.5) increases in jump height and medium gains in absolute peak power output (16.13%; P=0.009; Cohen's d=0.34) and relative peak power output to thigh muscle CSA (9.6%; P=0.002; Cohen's d=0.31). Further, there was a medium increase (5.9%, P=0.03; Cohen's d=0.36) in thigh muscle CSA. No significant changes were observed in the Control group. CONCLUSIONS In-season in-field biweekly squat VRT enhanced strength and power measures in junior soccer players.
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Affiliation(s)
- Mani Izadi
- Department of Exercise Physiology, Faculty of Sport Sciences, University of Guilan, Rasht, Iran
| | - Hamid Arazi
- Department of Exercise Physiology, Faculty of Sport Sciences, University of Guilan, Rasht, Iran -
| | - Rodrigo Ramirez-Campillo
- Laboratory of Human Performance, Quality of Life and Wellness Research Group, Department of Physical Activity Sciences, Universidad de Los Lagos, Osorno, Chile
| | - Mohammad Mirzaei
- Department of Exercise Physiology, Faculty of Sport Sciences, University of Guilan, Rasht, Iran
| | - Payam Saidie
- Department of Exercise Physiology, Faculty of Sport Sciences, University of Guilan, Rasht, Iran
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Haun CT, Vann CG, Roberts BM, Vigotsky AD, Schoenfeld BJ, Roberts MD. A Critical Evaluation of the Biological Construct Skeletal Muscle Hypertrophy: Size Matters but So Does the Measurement. Front Physiol 2019; 10:247. [PMID: 30930796 PMCID: PMC6423469 DOI: 10.3389/fphys.2019.00247] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 02/25/2019] [Indexed: 12/11/2022] Open
Abstract
Skeletal muscle is highly adaptable and has consistently been shown to morphologically respond to exercise training. Skeletal muscle growth during periods of resistance training has traditionally been referred to as skeletal muscle hypertrophy, and this manifests as increases in muscle mass, muscle thickness, muscle area, muscle volume, and muscle fiber cross-sectional area (fCSA). Delicate electron microscopy and biochemical techniques have also been used to demonstrate that resistance exercise promotes ultrastructural adaptations within muscle fibers. Decades of research in this area of exercise physiology have promulgated a widespread hypothetical model of training-induced skeletal muscle hypertrophy; specifically, fCSA increases are accompanied by proportional increases in myofibrillar protein, leading to an expansion in the number of sarcomeres in parallel and/or an increase in myofibril number. However, there is ample evidence to suggest that myofibrillar protein concentration may be diluted through sarcoplasmic expansion as fCSA increases occur. Furthermore, and perhaps more problematic, are numerous investigations reporting that pre-to-post training change scores in macroscopic, microscopic, and molecular variables supporting this model are often poorly associated with one another. The current review first provides a brief description of skeletal muscle composition and structure. We then provide a historical overview of muscle hypertrophy assessment. Next, current-day methods commonly used to assess skeletal muscle hypertrophy at the biochemical, ultramicroscopic, microscopic, macroscopic, and whole-body levels in response to training are examined. Data from our laboratory, and others, demonstrating correlations (or the lack thereof) between these variables are also presented, and reasons for comparative discrepancies are discussed with particular attention directed to studies reporting ultrastructural and muscle protein concentration alterations. Finally, we critically evaluate the biological construct of skeletal muscle hypertrophy, propose potential operational definitions, and provide suggestions for consideration in hopes of guiding future research in this area.
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Affiliation(s)
- Cody T Haun
- Department of Exercise Science, LaGrange College, LaGrange, GA, United States
| | | | - Brandon M Roberts
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Andrew D Vigotsky
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, United States
| | - Brad J Schoenfeld
- Department of Health Sciences, CUNY Lehman College, Bronx, NY, United States
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MacDonald AJ, Miller J, Ramage MI, Greig C, Stephens NA, Jacobi C, Preston T, Fearon KCH, Skipworth RJE. Cross sectional imaging of truncal and quadriceps muscles relates to different functional outcomes in cancer. Clin Nutr 2018; 38:2875-2880. [PMID: 30612853 PMCID: PMC6876543 DOI: 10.1016/j.clnu.2018.12.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 12/15/2018] [Accepted: 12/18/2018] [Indexed: 12/25/2022]
Abstract
Introduction Following the consensus definition of cancer cachexia, more studies are using CT scan analysis of truncal muscles as a marker of muscle wasting. However, how CT-derived body composition relates to function, strength and power in patients with cancer is largely unknown. Aims We aimed to describe the relationship between CT truncal (L3) skeletal muscle index (SMI) and MRI quadriceps cross sectional area with lower limb strength, power and measures of complex function. Methods Patients undergoing assessment for potentially curative surgery for oesophagogastric or pancreatic cancer were recruited from the regional upper gastrointestinal (UGI) or hepatopancreaticobiliary (HPB) multi-disciplinary team meetings. Maximum Isometric Knee Extensor Strength (IKES) and Maximum Leg Extensor Power (Nottingham Power Rig) (LEP) were used as measures of lower limb performance. Both Sit to Stand (STS) and Timed Up and Go (TUG) were used as measures of global complex muscle function. Muscle SMI was measured from routine CT scans at the level of the third lumbar vertebrae (L3) and MRI scan was used for the assessment of quadriceps muscles. Linear regression analysis was performed for CT SMI or MRI quadriceps as a predictor of each measure of performance. Results Forty-four patients underwent assessment. Height and weight were significantly related to function in terms of quadriceps power, while only weight was associated with strength (P < 0.001). CT SMI was not related to measures of quadriceps strength or power but had significant association with more complex functional measures (P = 0.006, R2 = 0.234 and 0.0019, R2 = 0.175 for STS and TUG respectively). In comparison, both gross and fat-subtracted measures of quadriceps muscle mass from MRI were significantly correlated with quadriceps strength and power (P < 0.001), but did not show any significant association with complex functional measures. Conclusion CT SMI and MRI quadriceps have been shown to reflect different aspects of functional ability with CT SMI being a marker of global muscle function and MRI quadriceps being specific to quadriceps power and strength. This should therefore be considered when choosing outcome measures for trials or definitions of muscle mass and function.
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Affiliation(s)
- A J MacDonald
- Clinical and Surgical Sciences, University of Edinburgh, Royal Infirmary of Edinburgh, 51 Little France Crescent, Edinburgh EH16 4SA, United Kingdom
| | - J Miller
- Clinical and Surgical Sciences, University of Edinburgh, Royal Infirmary of Edinburgh, 51 Little France Crescent, Edinburgh EH16 4SA, United Kingdom.
| | - M I Ramage
- Clinical and Surgical Sciences, University of Edinburgh, Royal Infirmary of Edinburgh, 51 Little France Crescent, Edinburgh EH16 4SA, United Kingdom
| | - C Greig
- School of Sport, Exercise, and Rehabilitation Sciences, MRC-Arthritis Research UK Centre for Musculoskeletal Ageing Research, NIHR Birmingham BRC, University of Birmingham, B15 2TT, United Kingdom
| | - N A Stephens
- Clinical and Surgical Sciences, University of Edinburgh, Royal Infirmary of Edinburgh, 51 Little France Crescent, Edinburgh EH16 4SA, United Kingdom
| | - C Jacobi
- Musculoskeletal Diseases Area, Muscle Group, Novartis Pharma AG, Novartis Campus, WSJ- 152.2.72.04, CH-4056, Basel, Switzerland
| | - T Preston
- Stable Isotope Biochemistry Laboratory, Scottish Universities Environmental Research Centre, The University of Glasgow, East Kilbride, G75 0QF, United Kingdom
| | - K C H Fearon
- Clinical and Surgical Sciences, University of Edinburgh, Royal Infirmary of Edinburgh, 51 Little France Crescent, Edinburgh EH16 4SA, United Kingdom
| | - R J E Skipworth
- Clinical and Surgical Sciences, University of Edinburgh, Royal Infirmary of Edinburgh, 51 Little France Crescent, Edinburgh EH16 4SA, United Kingdom
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Rutkowska-Kucharska A, Szpala A. The use of electromyography and magnetic resonance imaging to evaluate a core strengthening exercise programme. J Back Musculoskelet Rehabil 2018; 31:355-362. [PMID: 29060921 DOI: 10.3233/bmr-169780] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND The question that was asked in the study was whether a training routine based on curl-up exercises with a load provided by body mass of the person increases local muscle strength or local muscle endurance. OBJECTIVE The aim of this study was to evaluate the effect of 4 weeks training based on a small load and low movement velocity on electrical activity (EMG), cross-sectional area (CSA) of core stabilisers. METHODS The EMG activity was measured in the rectus abdominis (RA), obliquus abdominis externus and erector spinae (ES) muscles. CSA of the muscles: RA, anterolateral abdominal, psoas major, quadratus lumborum, ES, and multifidus at the level of L3-L4 were measured too. RESULTS The training increased the CSA and thickness in most of the muscles studied. Statistically significant correlation was found only for the ES circumference (left side) and EMG activity for the right side (r= 0.627, p= 0.022) and left side (r= 0.624, p= 0.023). CONCLUSIONS The training programme resulted in a increase in the number of curl-up repetitions revealing an endurance increase in abdominal muscles. Furthermore, there was a increase in the EMG activity of the RA. An increase of the CSA of all tested muscles showed an increase of muscle active force.
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Cholewa JM, Rossi FE, MacDonald C, Hewins A, Gallo S, Micenski A, Norton L, Campbell BI. The Effects of Moderate- Versus High-Load Resistance Training on Muscle Growth, Body Composition, and Performance in Collegiate Women. J Strength Cond Res 2018; 32:1511-1524. [DOI: 10.1519/jsc.0000000000002048] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Papadopoulou SK, Xyla EE, Methenitis S, Feidantsis KG, Kotsis Y, Pagkalos IG, Hassapidou MN. Nutrition strategies before and during ultra-endurance event: A significant gap between science and practice. Scand J Med Sci Sports 2017; 28:881-892. [DOI: 10.1111/sms.13006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/30/2017] [Indexed: 12/16/2022]
Affiliation(s)
- S. K. Papadopoulou
- Department of Nutrition and Dietetics; Technological Institute of Thessaloniki; Thessaloniki Greece
| | - E. E. Xyla
- Department of Nutrition and Dietetics; Technological Institute of Thessaloniki; Thessaloniki Greece
| | - S. Methenitis
- Department of Nutrition and Dietetics; Technological Institute of Thessaloniki; Thessaloniki Greece
- Athletics Laboratory; School of Physical Education and Sport Science; National and Kapodistrian University of Athens; Athens Greece
| | - K. G. Feidantsis
- Department of Nutrition and Dietetics; Technological Institute of Thessaloniki; Thessaloniki Greece
- Department of Biology; Aristotle University of Thessaloniki; Thessaloniki Greece
| | - Y. Kotsis
- Department of Nutrition and Dietetics; Faculty of Health Sciences and Education; Harokopio University; Athens Greece
| | - I. G. Pagkalos
- Department of Nutrition and Dietetics; Technological Institute of Thessaloniki; Thessaloniki Greece
- Department of Electrical & Computer Engineering; Aristotle University of Thessaloniki; Thessaloniki Greece
| | - M. N. Hassapidou
- Department of Nutrition and Dietetics; Technological Institute of Thessaloniki; Thessaloniki Greece
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Drummond MD, Szmuchrowski LA, Goulart KN, Couto BP. Effect of strength training on regional hypertrophy of the elbow flexor muscles. Muscle Nerve 2016; 54:750-5. [DOI: 10.1002/mus.25088] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Revised: 12/29/2015] [Accepted: 02/19/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Marcos D.M. Drummond
- Federal University of Minas Gerais, Av. Antônio Carlos; 6627 - Pampulha - Belo Horizonte - Minas Gerais Brazil CEP 31270-901
| | - Leszek A. Szmuchrowski
- Federal University of Minas Gerais, Av. Antônio Carlos; 6627 - Pampulha - Belo Horizonte - Minas Gerais Brazil CEP 31270-901
| | - Karine N.O. Goulart
- Federal University of Minas Gerais, Av. Antônio Carlos; 6627 - Pampulha - Belo Horizonte - Minas Gerais Brazil CEP 31270-901
| | - Bruno P. Couto
- Federal University of Minas Gerais, Av. Antônio Carlos; 6627 - Pampulha - Belo Horizonte - Minas Gerais Brazil CEP 31270-901
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Wankhede S, Langade D, Joshi K, Sinha SR, Bhattacharyya S. Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial. J Int Soc Sports Nutr 2015; 12:43. [PMID: 26609282 PMCID: PMC4658772 DOI: 10.1186/s12970-015-0104-9] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 11/16/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Withania somnifera (ashwagandha) is a prominent herb in Ayurveda. This study was conducted to examine the possible effects of ashwagandha root extract consumption on muscle mass and strength in healthy young men engaged in resistance training. METHODS In this 8-week, randomized, prospective, double-blind, placebo-controlled clinical study, 57 young male subjects (18-50 years old) with little experience in resistance training were randomized into treatment (29 subjects) and placebo (28 subjects) groups. Subjects in the treatment group consumed 300 mg of ashwagandha root extract twice daily, while the control group consumed starch placebos. Following baseline measurements, both groups of subjects underwent resistance training for 8 weeks and measurements were repeated at the end of week 8. The primary efficacy measure was muscle strength. The secondary efficacy measures were muscle size, body composition, serum testosterone levels and muscle recovery. Muscle strength was evaluated using the 1-RM load for the bench press and leg extension exercises. Muscle recovery was evaluated by using serum creatine kinase level as a marker of muscle injury from the effects of exercise. RESULTS Compared to the placebo subjects, the group treated with ashwagandha had significantly greater increases in muscle strength on the bench-press exercise (Placebo: 26.4 kg, 95% CI, 19.5, 33.3 vs. Ashwagandha: 46.0 kg, 95% CI 36.6, 55.5; p = 0.001) and the leg-extension exercise (Placebo: 9.8 kg, 95% CI, 7.2,12.3 vs. Ashwagandha: 14.5 kg, 95 % CI, 10.8,18.2; p = 0.04), and significantly greater muscle size increase at the arms (Placebo: 5.3 cm(2), 95% CI, 3.3,7.2 vs. Ashwagandha: 8.6 cm(2), 95% CI, 6.9,10.8; p = 0.01) and chest (Placebo: 1.4 cm, 95% CI, 0.8, 2.0 vs. Ashwagandha: 3.3 cm, 95% CI, 2.6, 4.1; p < 0.001). Compared to the placebo subjects, the subjects receiving ashwagandha also had significantly greater reduction of exercise-induced muscle damage as indicated by the stabilization of serum creatine kinase (Placebo: 1307.5 U/L, 95% CI, 1202.8, 1412.1, vs. Ashwagandha: 1462.6 U/L, 95% CI, 1366.2, 1559.1; p = 0.03), significantly greater increase in testosterone level (Placebo: 18.0 ng/dL, 95% CI, -15.8, 51.8 vs. Ashwagandha: 96.2 ng/dL, 95% CI, 54.7, 137.5; p = 0.004), and a significantly greater decrease in body fat percentage (Placebo: 1.5%, 95% CI, 0.4%, 2.6% vs. Ashwagandha: 3.5%, 95% CI, 2.0%, 4.9%; p = 0.03). CONCLUSION This study reports that ashwagandha supplementation is associated with significant increases in muscle mass and strength and suggests that ashwagandha supplementation may be useful in conjunction with a resistance training program.
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Affiliation(s)
- Sachin Wankhede
- />Sports Medicine, SrimatiKashibaiNavale Medical College, Pune, India
| | - Deepak Langade
- />Department of Pharmacology, BVDU Dental College & Hospital, Navi Mumbai, India
| | - Kedar Joshi
- />Department of Pharmacology, BharatiVidyapeeth Medical College & Hospital, Sangli, India
| | - Shymal R. Sinha
- />Department of Clinical Pharmacology, Grant Government Medical College, SirJamshedjeeJeejeebhoy Group of Hospitals, Mumbai, India
| | - Sauvik Bhattacharyya
- />Department of Pharmaceutical Technology, NSHM Knowledge Campus, 124 B.L. Saha Road, Kolkata, 700053 India
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Palmer TB, Thompson BJ, Hawkey MJ, Conchola EC, Adams BM, Akehi K, Thiele RM, Smith DB. The Influence of Athletic Status on the Passive Properties of the Muscle-Tendon Unit and Traditional Performance Measures in Division I Female Soccer Players and Nonathlete Controls. J Strength Cond Res 2014; 28:2026-34. [DOI: 10.1519/jsc.0000000000000332] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Palmer TB, Hawkey MJ, Smith DB, Thompson BJ. The Influence of Professional Status on Maximal and Rapid Isometric Torque Characteristics in Elite Soccer Referees. J Strength Cond Res 2014; 28:1310-8. [DOI: 10.1519/jsc.0000000000000278] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Palmer TB, Jenkins ND, Thompson BJ, Smith DB, Cramer JT. The relationship between passive stiffness and muscle power output: Influence of muscle cross-sectional area normalization. Muscle Nerve 2013; 49:69-75. [DOI: 10.1002/mus.23861] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/29/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Ty B. Palmer
- Department of Health and Human Performance; Oklahoma State University; Stillwater Oklahoma USA
| | - Nathaniel D.M. Jenkins
- Department of Nutrition and Health Sciences; 110 Ruth Leverton Hall, University of Nebraska-Lincoln; Lincoln Nebraska 68583-0806 USA
| | - Brennan J. Thompson
- Human Performance Laboratory; Department of Health; Exercise, and Sport Sciences; Texas Tech University; Lubbock Texas USA
| | - Douglas B. Smith
- Department of Health and Human Performance; Oklahoma State University; Stillwater Oklahoma USA
| | - Joel T. Cramer
- Department of Nutrition and Health Sciences; 110 Ruth Leverton Hall, University of Nebraska-Lincoln; Lincoln Nebraska 68583-0806 USA
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Cholewa JM, Wyszczelska-Rokiel M, Glowacki R, Jakubowski H, Matthews T, Wood R, Craig SA, Paolone V. Effects of betaine on body composition, performance, and homocysteine thiolactone. J Int Soc Sports Nutr 2013; 10:39. [PMID: 23967897 PMCID: PMC3844502 DOI: 10.1186/1550-2783-10-39] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Accepted: 08/09/2013] [Indexed: 11/17/2022] Open
Abstract
Background This study investigated the effects of long term betaine supplementation on body composition, performance, and homocysteine thiolactone (HCTL) in experienced strength trained men. Methods Twenty-three subjects were matched for training experience (4.8 ± 2.3 years) and body fat percentage (BF%: 16.9 ± 8.0%), randomly assigned to either a placebo (PL; n = 12) or betaine group (BET; n = 11; 2.5 g/day), and completed a 6 week periodized training program consisting of 3 two-week micro-cycles. Bench press and back squat training volumes were recorded and changes in training volume were assessed at each micro-cycle. Fasting urine was collected at baseline (BL), weeks 2, 4 and 6, and assayed for HCTL. Subjects were tested prior to and following 6 weeks of treatment. Arm and thigh cross sectional area (CSA) was estimated via girth and skin fold measurements. Body density was estimated via skin fold calipers and used to estimate BF%, fat mass (FM), and lean body mass (LBM). Performance was assessed via vertical jump (VJ), bench press 1 RM (BP), and back squat 1 RM (BS). Results Arm CSA increased significantly (p < .05) in BET but not PL. No differences existed between group and time for changes in thigh CSA. Back squat training volume increased significantly (p < .05) for both groups throughout training. Bench press training volume was significantly (p < .05) improved for BET compared to PL at microcycles one and three. Body composition (BF%, FM, LBM) improved significantly (p < .05) in BET but not PL. No differences were found in performance variables (BP, BS, VJ) between groups, except there was a trend (p = .07) for increased VJ power in BET versus PL. A significant interaction (p < .05) existed for HCTL, with increases from BL to week 2 in PL, but not BET. Additionally, HCTL remained elevated at week 4 in PL, but not BET. Conclusion Six-weeks of betaine supplementation improved body composition, arm size, bench press work capacity, attenuated the rise in urinary HCTL, and tended to improve power (p = .07) but not strength.
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Affiliation(s)
- Jason M Cholewa
- Department of Kinesiology, Recreation, and Sport Studies, Coastal Carolina University, Conway, SC, USA.
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Sherk VD, Bemben MG, Palmer IJ, Bemben DA. Effects of filtering methods on muscle and fat cross-sectional area measurement by pQCT: a technical note. Physiol Meas 2011; 32:N65-72. [DOI: 10.1088/0967-3334/32/12/n01] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Ryan ED, Thompson BJ, Herda TJ, Sobolewski EJ, Costa PB, Walter AA, Cramer JT. The relationship between passive stiffness and evoked twitch properties: the influence of muscle CSA normalization. Physiol Meas 2011; 32:677-86. [DOI: 10.1088/0967-3334/32/6/005] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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An examination of the time course of training-induced skeletal muscle hypertrophy. Eur J Appl Physiol 2011; 111:2785-90. [PMID: 21409401 DOI: 10.1007/s00421-011-1905-4] [Citation(s) in RCA: 119] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2010] [Accepted: 03/03/2011] [Indexed: 10/18/2022]
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