Body composition, fitness level, anabolic hormones, and inflammatory cytokines in the elderly: a randomized controlled t

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ORIGINAL ARTICLE

Body composition, fitness level, anabolic hormones, and inflammatory cytokines in the elderly: a randomized controlled trial Wi-young So • Misoon Song • Yeon-hwan Park Be-long Cho • Jae-young Lim • Seon-ho Kim • Wook Song



Received: 7 January 2012 / Accepted: 12 May 2012 / Published online: 9 April 2013 Ó Springer International Publishing Switzerland 2013

Abstract Background and aims Elastic band exercise is considered as an effective and safe resistance type of exercise. However, there is a paucity of knowledge of the physiological effect of long-term elastic band exercise in the elderly. The purpose of this study was to examine the effects of a 12-week elastic band exercise program on body composition, physical fitness, anabolic hormones, and inflammatory cytokines in the elderly. Methods The subjects (aged 65–82 years) were randomly assigned into the exercise group (n = 18) or the control group (n = 22). Elastic band exercise session was performed for 60 min, three times per week for 12 weeks, during which various types of resistance exercises were assigned to the exercise group using red-colored bands. Body composition was analyzed using the biolelectrical

impedance measurement. Senior fitness test was adopted to determine the level of physical fitness. Results After 12 weeks of band exercise program, body composition and all fitness components of senior fitness test were significantly improved in the exercise group compared to the control group. In contrast, blood lipid profiles (TC, TG, and HDL), anabolic hormones (GH, IGF1 and IGFBP-3), and inflammatory cytokines (TNF-a, IL1b, IL-6, and CRP) were not significantly changed in the exercise group compared to the control group. Conclusions Our results showed that elastic band exercise did not appear to positively impact on blood lipids, anabolic hormones, and inflammatory cytokines, but significantly improved body composition and overall physical fitness level in the elderly. Keywords Elastic band exercise  Body composition  Fitness  Anabolic hormones  Inflammatory cytokines

W. So  W. Song (&) Health and Exercise Science Laboratory, Institute of Sports Science, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151–742, Korea e-mail: [email protected] M. Song  Y. Park  S. Kim College of Nursing, Research Institute of Nursing Science, Seoul National University, Seoul, Korea B. Cho Department of Family Medicine, Seoul National University Hospital, Seoul, Korea J. Lim Department of Rehabilitation Medicine, Seoul National University Bundang Hospital, Seoul, Korea W. Song Institute on Aging, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea

Introduction In 1989, Rosenberg firstly reported an epidemiological study concerning muscle loss associated with aging, which is called ‘‘sarcopenia’’ [1]. Sarcopenia was shown in more than 25 % of subjects over 65 and more than 50 % in those over 80 [2]. Although sarcopenia is not likely to be related directly to a cause of death; however, the muscle loss generally caus