著者
柏木 朋也 桜井 智野風 南 和広 鈴木 健太 樫村 修生
出版者
The Japanese Society of Physical Fitness and Sports Medicine
雑誌
体力科學 (ISSN:0039906X)
巻号頁・発行日
vol.58, no.2, pp.285-294, 2009-04-01
被引用文献数
1

The present study was to evaluate endothelial nitric oxide synthase (eNOS) protein expression and hemodynamics of pulmonary circulation in rats of "Living high and Training low" (LH+TL). The Sprague Dawley strain of male rats were used at the age of 9 weeks. They were divided according to four conditions of a living low (LL) group, living low and training low (LL+TL) group, living high (LH) group and LH+TL group, for 10 days. We assessed the effects of LH+TL on exercise-induced pulmonary arterial pressure and blood lactic acids under sea-level altitude in catheter-implanted conscious rats. Also, we measured the pulmonary artery under anesthesia and analyzed eNOS protein expression by western blot analysis. The blood lactate levels in the LH+TL rats decreased after maximal treadmill running compared to LL, LL+TL and LH rats (p<0.05). The increase in pulmonary arterial blood pressure with exercise was significantly lower in the LH+TL group than in the LL group (p<0.05). The eNOS protein expressions of pulmonary artery were higher in the LH+TL group than in the LL group (p<0.05). This study indicates that LH+TL reduced the increase of pulmonary arterial blood pressure with exercise at below sea-level altitude. In addition, eNOS protein expressions were enhanced in the pulmonary arteries of LH+TL rats. Thus, we conclude that the high altitude training of LH+TL was a useful method for improvement of endurance exercise ability and this improvement may be associated with pulmonary arterial response.
著者
原田 亜紀子 川久保 清 李 廷秀 岩垂 信 池田 千恵子 茂住 和代 南 伸子
出版者
日本体力医学会
雑誌
体力科學 (ISSN:0039906X)
巻号頁・発行日
vol.50, no.2, pp.229-236, 2001-04-01
被引用文献数
9 1

The purpose of this study was to evaluate the validity of two different measures of physical activity under normal living conditions. The 24-hour physical activity diary method (24 HD) and accelerometer (Lifecorder) were analyzed. Total daily energy expenditure (TDEE) and daily variation of energy expenditure (EE) were compared employing the two measures in conjunction with the minute-by-minute heart rate method (Flex HR) in middle-aged people with a mean age of 57.9 yr (N=17), and in young people (college students) with a mean age of 23.5 yr (N=11). The TDEE as measured by the 24 HD and Lifecorder was 2576.4±514.7 kcal・d^<-1> and 1973.1±290.2 kcal・d^<-1> respectively. The TDEE as measured by the Flex HR method was 2718.3±625.5 kcal・d^<-1>. The TDEE as measured by the Lifecorder method was significantly lower than that of the Flex HR method (p<0.01). The correlation coefficient (r) for the 24 HD and Flex HR measured values for TDEE (kcal/day) was 0.64 (p<0.01), and that for Lifecorder and Flex HR was 0.38. The daily variation of energy expenditure pattern measured by Lifecorder was similar to that of the Flex HR 24 HD measurements, on the other hand, were slightly lower than Flex HR measurements during the afternoon period. The 24 HD method was reasonably accurate in the testing. The daily variation of energy expenditure measured pattern by Lifecorder was similar to that of the Flex HR method l but the fact that the TDEE results were underestimated suggests that the Lifecorder method has merit in the measurement of daily activity patterns. It follows from this that to improve measurement of the TDEE, it is necessary to modify the Lifecorder method of calculating the algorithm.
著者
宮崎 俊彦
出版者
日本体力医学会
雑誌
体力科學 (ISSN:0039906X)
巻号頁・発行日
vol.48, no.6, 1999-12-01