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The effect of 6-month use of circuit gym on muscle and fat cross-sectional area and muscle strength in middle and older-aged women

  • Tanabe Kai
    Fuculty of Human Health Department of Health and Nutrition Sciences, Komazawa Women’s University
  • Bang Eunji
    Graduate School of Comprehensive Human Sciences, University of Tsukuba
  • Sakurai Yuko
    Graduate School of Comprehensive Human Sciences, University of Tsukuba
  • Yokoyama Noriko
    Graduate School of Comprehensive Human Sciences, University of Tsukuba
  • Chijiki Shoko
    Graduate School of Comprehensive Human Sciences, University of Tsukuba
  • Saito Hikaru
    Curves Japan Co., Ltd
  • Tsuda Hitomi
    Curves Japan Co., Ltd
  • Saito Naomi
    Tsukuba Wellness Research Co., Ltd
  • Kuno Shinya
    Graduate School of Comprehensive Human Sciences, University of Tsukuba

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Other Title
  • 6ヶ月間のサーキットジムの利用が中高齢女性の筋・脂肪横断面積と筋力に及ぼす影響
  • 6カゲツカン ノ サーキットジム ノ リヨウ ガ チュウ コウレイ ジョセイ ノ スジ ・ シボウ オウ ダンメンセキ ト キンリョク ニ オヨボス エイキョウ

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Abstract

<p>This study examined the effects of a 6-month circuit gym workout on muscle and fat cross-sectional area (CSA) and muscle strength in middle-aged and older women. The participants were 49 women without severe metabolic disease, exercise limitation, or exercise habits. They were randomly assigned to two groups, circuit gym using group (CRT: n = 25) and walking group (WALK: n = 24). Both groups followed the exercise program for 6 months. Thigh and abdominal CSA before and after the program were measured using magnetic resonance imaging. Moreover, knee extensor/flexor and hip flexor strength were measured using a dynamometer. After completion of the exercise program, CSA of the psoas major muscle and isokinetic knee and hip flexion strength significantly increased in the CRT group compared with the WALK group (CSA: 7.1% vs 1.4% respectively; isokinetic strength: 7.5% vs −4.3% (knee), 23.6% vs 2.2% (hip), respectively). In addition, subcutaneous adipose tissue of the thigh in the CRT group significantly decreased compared with that in the WALK group (−6.5% vs −1.8%, respectively). These results imply that in middle-aged and older women, the use of circuit gym leads to a more effective increase in CSA of the psoas major muscle, decrease in thigh subcutaneous adipose tissue, and increase in knee and hip flexor strength compared with brisk walking.</p>

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