Improved skeletal muscle mass and strength after heavy strength training in very old individuals.

Autor: Bechshøft RL; Institute of Sports Medicine Copenhagen, Bispebjerg Hospital, and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark., Malmgaard-Clausen NM; Institute of Sports Medicine Copenhagen, Bispebjerg Hospital, and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark., Gliese B; Institute of Sports Medicine Copenhagen, Bispebjerg Hospital, and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark., Beyer N; Musculoskeletal Rehabilitation Research Unit, Dept. of Physical and Occupational Therapy, Bispebjerg Hospital, Denmark., Mackey AL; Institute of Sports Medicine Copenhagen, Bispebjerg Hospital, and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark; Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark. Electronic address: abigailmac@sund.ku.dk., Andersen JL; Institute of Sports Medicine Copenhagen, Bispebjerg Hospital, and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark. Electronic address: jesper.loevind.andersen@regionh.dk., Kjær M; Institute of Sports Medicine Copenhagen, Bispebjerg Hospital, and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark. Electronic address: michaelkjaer@sund.ku.dk., Holm L; Institute of Sports Medicine Copenhagen, Bispebjerg Hospital, and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark; Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark. Electronic address: larsh@sund.dk.
Jazyk: angličtina
Zdroj: Experimental gerontology [Exp Gerontol] 2017 Jun; Vol. 92, pp. 96-105. Date of Electronic Publication: 2017 Mar 28.
DOI: 10.1016/j.exger.2017.03.014
Abstrakt: Age-related loss of muscle mass and function represents personal and socioeconomic challenges. The purpose of this study was to determine the adaptation of skeletal musculature in very old individuals (83+ years) performing 12weeks of heavy resistance training (3×/week) (HRT) compared to a non-training control group (CON). Both groups received similar protein supplementations. We studied 26 participants (86.9±3.2 (SD) (83-94, range) years old) per-protocol. Quadriceps cross-sectional area (CSA) differed between groups at post-test (P<0.05) and increased 1.5±0.7cm 2 (3.4%) (P<0.05) in HRT only. The increase in CSA is correlated inversely with the baseline level of CSA (R 2 =0.43, P<0.02). Thigh muscle isometric strength, isokinetic peak torque and power increased significantly only in HRT by 10-15%, whereas knee extension one-repetition maximum (1 RM) improved by 91%. Physical functional tests, muscle fiber type distribution and size did not differ significantly between groups. We conclude that in protein supplemented very old individuals, heavy resistance training can increase muscle mass and strength, and that the relative improvement in mass is more pronounced when initial muscle mass is low.
(Copyright © 2017. Published by Elsevier Inc.)
Databáze: MEDLINE
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