12週間の有酸素運動が運動習慣のない若年者の暑熱環境下の起立性循環調節反応に及ぼす影響

Translated title of the contribution: Effects of 12 Weeks of Physical Training on Cardiovascular Responses to Head-Up Tilt during Heat Exposure in Sedentary Men

Kanta Aoki, Keita Ishibashi, Takafumi Maeda, Shigekazu Higuchi, Akira Yasukouchi

Research output: Contribution to journalArticle

Abstract

The purpose of this study was to investigate the effects of 12weeks of physical training on cardiovascular responses to postural change at 27℃ and 35℃. 16 sedentary subjects were assigned to either a training group (n=8:30-min ergometer at 60% V^^・O_2peak, 3 days a week) or a control group (n=8 : no exercise). Measurements were made of heart rate (HR), stroke volume (SV), cardiac index (CI), mean blood pressure (MBP), total peripheral resistance (TPR), rectal temperature (Tr), mean skin temperature (Tsk) and heart rate variability (HRV), before and after a chronic physical training. After training, training group significantly increased their V^^・O_2 peak (+10.3%, p<0.01). As for the cardiovascular responses to head-up tilt, in both group there were significant interaction effects between postural condition and ambient temperature in HR, CI and TPR. In training group, HR was significantly decreased after training during head-up tilt at 27℃. These results suggest that the physical training may effect on cardiovascular responses to postural change.
Translated title of the contributionEffects of 12 Weeks of Physical Training on Cardiovascular Responses to Head-Up Tilt during Heat Exposure in Sedentary Men
Original languageJapanese
Pages (from-to)27-38
Number of pages12
Journal日本生理人類学会誌 = Japanese journal of physiological anthropology
Volume13
Issue number1
DOIs
Publication statusPublished - 2008

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