Human cardiovascular and humoral responses to moderate muscle activation during dynamic exercise

Takeshi Nishiyasu, Kei Nagashima, Ethan R. Nadel, Gary W. Mack

研究成果: Article査読

13 被引用数 (Scopus)

抄録

We examined the hypothesis that activation of the muscle metaboreflex during dynamic exercise would augment influences tending to cause a rise in arginine vasopressin, plasma renin activity, and catecholamines during dynamic exercise in humans. Ten healthy adults performed 30 min of supine cycle ergometer exercise at ~50% of peak oxygen consumption with or without moderate muscle metaboreflex activation by application of 35 mmHg lower body positive pressure (LBPP). Application of LBPP during the first 15 or last 15 min of exercise increased mean arterial blood pressure, plasma lactate concentration, and minute ventilation, indicating an activation of the muscle metaboreflex. These changes were rapidly reversed when LBPP was removed. During exercise at this intensity, LBPP augmented the release of arginine vasopressin and catecholamines but not of plasma renin activity. These results suggest that, although in humans hormonal responses are induced by moderate activation of the muscle metaboreflex during dynamic exercise, the thresholds for these responses may not be uniform among the various glands and hormones.

本文言語English
ページ(範囲)300-307
ページ数8
ジャーナルJournal of Applied Physiology
88
1
DOI
出版ステータスPublished - 2000 1
外部発表はい

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

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