Effects of acute aerobic repetition exercise on the vascular endothelial function

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  • Tamura Yasuaki
    Department of Rehabilitation Medicine, Tokushima Prefecture Naruto Hospital Graduate School of Integrated Arts and Science, Tokushima University
  • Miura Hajime
    Laboratory for Applied Physiology, Faculty of Integrated Arts and Science, Tokushima University
  • Deguchi Kenichi
    Department of Rehabilitation Medicine, Tokushima Prefecture Naruto Hospital
  • Azuma Ayako
    Graduate School of Integrated Arts and Science, Tokushima University
  • Hashimoto Yuji
    Graduate School of Integrated Arts and Science, Tokushima University
  • Ishikawa Miduki
    Graduate School of Integrated Arts and Science, Tokushima University

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Other Title
  • レペティション形式の有酸素性運動が血管内皮機能に及ぼす影響
  • レペティション ケイシキ ノ ユウサンソセイ ウンドウ ガ ケッカン ナイヒ キノウ ニ オヨボス エイキョウ

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<p>High-intensity interval exercise (IE) leads to greater improvements in the arterial function than continuous exercise at moderate intensity (CE). However, few studies have been performed on the effects of the repetition exercise (RE) on the vascular endothelial function. The purpose of this study was to compare the effects of CE vs. IE vs. RE during aerobic exercise on the vascular endothelial function determined by flow-mediated vasodilation (FMD). Ten healthy male subjects randomly performed 3 trials as follows: CE (20-min cycling at 50%Wmax), IE (10 × 1-min intervals cycling at 75%Wmax interspersed with 1-min intervals cycling at 25%Wmax), and RE (30 × 20-sec intervals cycling at 100%Wmax interspersed with 20-sec intervals at rest). FMD was assessed at rest and 30 and 60 min after each exercise, and then the normalized FMD (nFMD) was calculated from the peak shear rate. The nFMD (a.u.) significant increased 30 min after IE (1.2 ± 0.2 to 3.0 ± 1.0, p<0.05) and increased 30 min after CE (1.0 ± 0.2 to 1.4 ± 0.2, n.s.) and returned to baseline at 60 min after both exercises, while the nFMD decreased 30 min after RE (1.3 ± 0.2 to 1.2 ± 0.1, n.s.) and was sustained at 60 min. The nFMD value at 30 min after IE was significantly greater than that at 30 min after RE (3.0 ± 1.0 versus 1.2 ± 0.1, p<0.05). These results suggest that RE may lead to a less improvement in the vascular endothelial function than CE and IE.</p>

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