Protein supplementation during resistance-type exercise training in the elderly

Journal article


Leenders, Marika, Verdijk, Lex B., van der Hoeven, Letty, Kranenburg, Janneau Van, Nilwik, Rachel, Wodzig, Will K. W. H., Senden, Joan M.G., Keizer, Hans A. and Van Loon, Luc J.C.. (2013). Protein supplementation during resistance-type exercise training in the elderly. Medicine and Science in Sports and Exercise. 45(3), pp. 542 - 552. https://doi.org/10.1249/MSS.0b013e318272fcdb
AuthorsLeenders, Marika, Verdijk, Lex B., van der Hoeven, Letty, Kranenburg, Janneau Van, Nilwik, Rachel, Wodzig, Will K. W. H., Senden, Joan M.G., Keizer, Hans A. and Van Loon, Luc J.C.
Abstract

LEENDERS, M., L. B. VERDIJK, L. VAN DER HOEVEN, J. VAN KRANENBURG, R. NILWIK, W. K. W. H. WODZIG, J. M. G. SENDEN, H. A. KEIZER, and L. J. C. VAN LOON. Protien Supplementation during Resistance-Type Exercise Training in the Elderly. Med. Sci. Sports Exerc., Vol. 45, No. 3, pp. 542–552, 2013. Introduction: Resistance training has been well established as an effective treatment strategy to increase skeletal muscle mass and strength in the elderly. We assessed whether dietary protein supplementation can further augment the adaptive response to prolonged resistance-type exercise training in healthy elderly men and women. Methods: Healthy elderly men (n = 31, 70 T 1 yr) and women (n = 29, 70 T 1 yr) were randomly assigned to a progressive, 24-wk resistance-type exercise training program with or without additional protein supplementation (15 gIdj1 ). Muscle hypertrophy was assessed on a wholebody Dual-energy X-ray absorptiometry (DXA), limb (computed tomography), and muscle fiber (biopsy) level. Strength was assessed regularly by 1-repetition maximum (RM) strength testing. Functional capacity was assessed with a sit-to-stand and handgrip test. Results: One-RM strength increased by 45% T 6% versus 40% T 3% (women) and 41% T 4% versus 44% T 3% (men) in the placebo versus protein group, respectively (P G 0.001), with no differences between groups. Leg muscle mass (women, 4% T 1% vs 3% T 1%; men, 3% T 1% vs 3% T 1%) and quadriceps cross-sectional area (women, 9% T 1% vs 9% T 1%; men, 9% T 1% vs 10% T 1%) increased similarly in the placebo versus protein groups (P G 0.001). Type II muscle fiber size increased over time in both placebo and protein groups (25% T 13% vs 30% T 9% and 23% T 12% vs 22% T 10% in the women and men, respectively). Sit-to-stand improved by 18% T 2% and 19% T 2% in women and men, respectively (P G 0.001). Conclusion: Prolonged resistance-type exercise training increases skeletal muscle mass and strength, augments functional capacity, improves glycemia and lipidemia, and reduces blood pressure in healthy elderly men and women. Additional protein supplementation (15 gIdj1 ) does not further increase muscle mass, strength, and/or functional capacity

KeywordsSarcopenia; Muscle Mass; Strength; Functional capacity
Year2013
JournalMedicine and Science in Sports and Exercise
Journal citation45 (3), pp. 542 - 552
PublisherLippincott Williams & Wilkins
ISSN0195-9131
Digital Object Identifier (DOI)https://doi.org/10.1249/MSS.0b013e318272fcdb
Scopus EID2-s2.0-84875220876
Page range542 - 552
Research GroupMary MacKillop Institute for Health Research
Publisher's version
File Access Level
Controlled
Place of publicationUnited States
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