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Effects of exercise and tea catechins on muscle mass, strength and walking ability in community‐dwelling elderly Japanese sarcopenic women: A randomized controlled trial
Author(s) -
Kim Hunkyung,
Suzuki Takao,
Saito Kyoko,
Yoshida Hideyo,
Kojima Narumi,
Kim Miji,
Sudo Motoki,
Yamashiro Yukari,
Tokimitsu Ichiro
Publication year - 2013
Publication title -
geriatrics and gerontology international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.823
H-Index - 57
eISSN - 1447-0594
pISSN - 1444-1586
DOI - 10.1111/j.1447-0594.2012.00923.x
Subject(s) - sarcopenia , medicine , catechin , physical therapy , preferred walking speed , bioelectrical impedance analysis , confidence interval , randomized controlled trial , odds ratio , muscle mass , body mass index , biochemistry , antioxidant , polyphenol , chemistry
Aim: To investigate the effects of exercise and/or tea catechin supplementation on muscle mass, strength and walking ability in elderly Japanese women with sarcopenia. Methods: A total of 128 women aged over 75 years were defined as sarcopenic and randomly assigned into four groups: exercise and tea catechin supplementation ( n = 32), exercise ( n = 32), tea catechin supplementation ( n = 32) or health education ( n = 32). The exercise group attended a 60‐min comprehensive training program twice a week and the tea catechin supplementation group ingested 350 mL of a tea beverage fortified with catechin daily for 3 months. Body composition was determined by bioelectrical impedance analysis. Interview data and functional fitness measurements, such as muscle strength, balance and walking ability, were collected at baseline and after the 3‐month intervention. Results: There were significant group × time interactions observed in timed up & go ( P < 0.001), usual walking speed ( P = 0.007) and maximum walking speed ( P < 0.001). The exercise + catechin group showed a significant effect (odds ratio 3.61, 95% confidence interval 1.05–13.66) for changes in the combined variables of leg muscle mass and usual walking speed compared with the health education group. Conclusions: The combination of exercise and tea catechin supplementation had a beneficial effect on physical function measured by walking ability and muscle mass. Geriatr Gerontol Int 2013; 13: 458–465 .