Effects of nitric oxide synthase inhibitor on decrease in peripheral arterial stiffness with acute low-intensity aerobic exercise

Jun Sugawara, Seiji Maeda, Takeshi Otsuki, Takumi Tanabe, Ryuichi Ajisaka, Mitsuo Matsuda*

*この研究の対応する著者

研究成果: Article査読

67 被引用数 (Scopus)

抄録

We previously reported that even low-intensity, short-duration acute aerobic exercise decreases arterial stiffness. We aimed to test the hypothesis that the exercise-induced decrease in arterial stiffness is caused by the increased production of NO in vascular endothelium with exercise. Nine healthy men (age: ∼22-28 yr) performed a 5-min single-leg cycling exercise (30 W) in the supine position under an intravenous infusion of NG-monomethyl- L-arginine (L-NMMA; 3 mg/kg during the initial 5 min and subsequent continuous infusion of 50 μg·kg-1·min-1 in saline) or vehicle (saline) in random order on separate days. The pulse wave velocity (PWV) from the femoral to posterior tibial artery was measured on both legs before and after the infusion at rest and 2 min after exercise. Under the control condition, exercised leg PWV significantly decreased after exercise (P < 0.05), whereas nonexercised leg PWV did not show a significant change throughout the experiment. Under L-NMMA administration, exercised leg PWV was increased significantly by the infusion (P < 0.05) but decreased significantly after the exercise (P < 0.05). Nonexercised leg PWV increased with L-NMMA administration and maintained a significantly higher level during the administration compared with baseline (before the infusion, all P < 0.05). The NO synthase blockade × time interaction on exercised leg PWV was not significant (P = 0.706). These results suggest that increased production of NO is not a major factor in the decrease of regional arterial stiffness with low-intensity, short-duration aerobic exercise.

本文言語English
ページ(範囲)H2666-H2669
ジャーナルAmerican Journal of Physiology - Heart and Circulatory Physiology
287
6 56-6
DOI
出版ステータスPublished - 2004 12月
外部発表はい

ASJC Scopus subject areas

  • 生理学
  • 循環器および心血管医学
  • 生理学(医学)

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