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Resistance exercise combined with essential amino acid supplementation improved walking ability in elderly people.

Authors
  • Kawada, Shigeo
  • Okamoto, Y
  • Ogasahara, K
  • Yanagisawa, S
  • Ohtani, M
  • Kobayashi, K
Type
Published Article
Journal
Acta physiologica Hungarica
Publication Date
Sep 01, 2013
Volume
100
Issue
3
Pages
329–339
Identifiers
DOI: 10.1556/APhysiol.100.2013.008
PMID: 23681049
Source
Medline
License
Unknown

Abstract

We investigated the effects of resistance exercise combined with essential amino acid supplementation on psoas major muscle (PMM) hypertrophy and walking ability in elderly individuals. Twenty-nine healthy elderly individuals were assigned to 3 groups: (1) E (exercise), (2) A3 (exercise combined with 3.0 g of essential amino acid supplementation), and (3) A6 (exercise combined with 6.0 g of essential amino acid supplementation). To evaluate walking ability, the participants underwent the following 3 types of tests: the (1) 10-meter walk (10-W), (2) 10-meter walk involving crossing of obstacles (10-W + O), and (3) 6-minute walk (6M-W) tests. The 6-month training program resulted in significant PMM hypertrophy in all groups independent of amino acid supplementation. The extent of hypertrophy in the participants who took amino acids was dose-dependent, although the differences were not significant. Groups A3 and A6 demonstrated improvements in the 10-W and 10-W + O tests, whereas no improvement was observed in group E, regardless of PMM hypertrophy. Furthermore, group A6 showed an improvement in the 6M-W test. These results suggest that our training program causes PMM hypertrophy, whereas the training program combined with essential amino acid supplementation improves walking ability.

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