NDLI: Protein supplementation during resistance-type exercise training in the elderly.

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Protein supplementation during resistance-type exercise training in the elderly.

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Protein supplementation during resistance-type exercise training in the elderly.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Van der Hoeven, Letty Van Kranenburg, Janneau Wodzig, Will K. W. H. Leenders, Marika Keizer, Hans A. Verdijk, Lex B. Van Loon, Luc J. C. Nilwik, Rachel Senden, Joan M. G.
Description	Country affiliation: Netherlands Author Affiliation: Leenders M ( Top Institute Food and Nutrition, Wageningen, The Netherlands.)
Abstract	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 ± 1 yr) and women (n = 29, 70 ± 1 yr) were randomly assigned to a progressive, 24-wk resistance-type exercise training program with or without additional protein supplementation (15 g·d-1). Muscle hypertrophy was assessed on a whole-body 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% ± 6% versus 40% ± 3% (women) and 41% ± 4% versus 44% ± 3% (men) in the placebo versus protein group, respectively (P < 0.001), with no differences between groups. Leg muscle mass (women, 4% ± 1% vs 3% ± 1%; men, 3% ± 1% vs 3% ± 1%) and quadriceps cross-sectional area (women, 9% ± 1% vs 9% ± 1%; men, 9% ± 1% vs 10% ± 1%) increased similarly in the placebo versus protein groups (P < 0.001). Type II muscle fiber size increased over time in both placebo and protein groups (25% ± 13% vs 30% ± 9% and 23% ± 12% vs 22% ± 10% in the women and men, respectively). Sit-to-stand improved by 18% ± 2% and 19% ± 2% in women and men, respectively (P < 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 g·d-1) does not further increase muscle mass, strength, and/or functional capacity.
ISSN	01959131
Issue Number	3
Volume Number	45
e-ISSN	15300315
Journal	Medicine & Science in Sports & Exercise
Language	English
Publisher	Lippincott Williams & Wilkins (on behalf of the American College of Sports Medicine)
Publisher Date	2013-03-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Adaptation, Physiological Dietary Proteins Administration & Dosage Dietary Supplements Quadriceps Muscle Anatomy & Histology Physiology Resistance Training Absorptiometry, Photon Aged Analysis Of Variance Body Composition Cholesterol Blood Creatinine Female Hand Strength Hemoglobin A, Glycosylated Metabolism Humans Insulin Resistance Lipoproteins, Ldl Male Muscle Fibers, Fast-twitch Cytology Muscle Strength Nitrogen Urine Tomography, X-ray Computed Journal Article Randomized Controlled Trial Discipline Sports Science
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physical Therapy, Sports Therapy and Rehabilitation Sports Science

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