The effects of resistance training with or without peanut protein supplementation on skeletal muscle and strength adapta
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(2020) 17:66
RESEARCH ARTICLE
Open Access
The effects of resistance training with or without peanut protein supplementation on skeletal muscle and strength adaptations in older individuals Donald A. Lamb1, Johnathon H. Moore2, Morgan A. Smith2, Christopher G. Vann2, Shelby C. Osburn2, Bradley A. Ruple2, Carlton D. Fox2, Kristen S. Smith1, Olivia M. Altonji1, Zade M. Power2, Annsley E. Cerovsky2, C. Owen Ross2, Andy T. Cao2, Michael D. Goodlett3,4, Kevin W. Huggins1†, Andrew D. Fruge1†, Kaelin C. Young2,4† and Michael D. Roberts2,4*†
Abstract Several studies suggest resistance training (RT) while supplementing with various protein supplements can enhance strength and muscle mass in older individuals. However, to date, no study has examined the effects of RT with a peanut protein powder (PP) supplement on these outcomes. Herein, 39 older, untrained individuals (n = 17 female, n = 22 male; age = 58.6 ± 8.0 years; body mass index =28.7 ± 5.8) completed a 6-week (n = 22) or 10-week (n = 17) RT program, where full-body training was implemented twice weekly (ClinicalTrials.gov trial registration NCT04015479; registered July 11, 2019). Participants in each program were randomly assigned to consume either a PP supplement once per day (75 total g powder providing 30 g protein, > 9.2 g essential amino acids, ~ 315 kcal; n = 20) or no supplement (CTL; n = 19). Right leg vastus lateralis (VL) muscle biopsies were obtained prior to and 24 h following the first training bout in all participants to assess the change in myofibrillar protein synthetic rates (MyoPS) as measured via the deuterium-oxide (D2O) tracer method. Pre- and Post-intervention testing in all participants was conducted using dual energy x-ray absorptiometry (DXA), VL ultrasound imaging, a peripheral quantitative computed tomography (pQCT) scan at the mid-thigh, and right leg isokinetic dynamometer assessments. Integrated MyoPS rates over a 24-h period were not significantly different (p < 0.05) between supplement groups following the first training bout. Regarding chronic changes, there were no significant supplement-by-time interactions in DXA-derived fat mass, lean soft tissue mass or percent body fat between supplementation groups. There was, however, a significant increase in VL thickness in PP versus CTL participants (Continued on next page)
* Correspondence: [email protected] Kevin W. Huggins, Andrew D. Fruge, Kaelin C. Young and Michael D. Roberts are co-principal investigators. 2 Molecular and Applied Sciences Laboratory, Applied Physiology Laboratory, School of Kinesiology, Auburn University, 301 Wire Road, Office 260, Auburn, AL 36849, USA 4 Edward Via College of Osteopathic Medicine Auburn, Auburn, AL 36832, USA Full list of author information is available at the end of the article © The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the origi
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