Study on the Exercise Tolerance in Healthy Japanese Adults and Its Application to Exercise Prescriptions
【Supercategory：7. DESCENTE SPORTS SCIENCE Subcategory：7.3 Vol.3】
The object of this study should be to establish the basis of the exercise prescription for the middle aged person through the exercise tolerance and the regression equation of the maximal heart rate with aging in healthy Japanese adults.
142 carefully selected healthy adults underwent symptom-limited maximal exercise test by means of bicycle ergometer and maximal heart rate and endurance time were investigated. ECG, blood pressure and heart rate were observed during exercise and recovery. In our study healthy adults were carefully selected and the endpoint of maximal exercise test were also carefully determined. Because both the selection of the subjects and determination of the endpoint were very important factors to obtain standard data of the exercise tolerance in healthy Japanese adults.
Results are as follows.
1. Maximal heart rate is inversely correlated to age.
The regression equation in male:
y=203.4-0.71×age min.
The regression equation in female:
y=203.3-0.83×age min.
The constants in these regression equations are slightly lower than those reported by Bruce, Lester and Sheffiled in U.S.A.
2. Endurance time is inversely correlated to age. The regression equation is obtained as follows.
Male: y=18.83-0.15×age min.
Female: y=16.24-0.10×age min.
The gradual shortening of endurance time depending on age may result from the reducing of max. VO₂ with aging. With the real observed endurance time, regression equation may be applicable reversely to calculating the estimated age - "Standard Aerobic Age" -as an index for endurance.
3. In 108 healthy men, their heart rates were almost equal, responding to the equal work loads at the submaximal level without distinction of age except the 60s. Accordingly, % MHR (percent of maximal heart rate) gradually increased with aging for the equal work loads. It means the decrease of reserve of aerobic capacity with aging.
In Japan, there has been a few reports on the regression equation of the maximal heart rate and endurance time in healthy Japanese adults; especially there are very few reports on maximal exercise test in which subjects as healthy adults are carefully selected. Therefore results of this study have a great value of the practical application for the exercise examination and prescription for Japanese adults, and also have a great deal of social significance now in Japan.
DESCENTE SPORTS SCIENCE Vol.3/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
142 carefully selected healthy adults underwent symptom-limited maximal exercise test by means of bicycle ergometer and maximal heart rate and endurance time were investigated. ECG, blood pressure and heart rate were observed during exercise and recovery. In our study healthy adults were carefully selected and the endpoint of maximal exercise test were also carefully determined. Because both the selection of the subjects and determination of the endpoint were very important factors to obtain standard data of the exercise tolerance in healthy Japanese adults.
Results are as follows.
1. Maximal heart rate is inversely correlated to age.
The regression equation in male:
y=203.4-0.71×age min.
The regression equation in female:
y=203.3-0.83×age min.
The constants in these regression equations are slightly lower than those reported by Bruce, Lester and Sheffiled in U.S.A.
2. Endurance time is inversely correlated to age. The regression equation is obtained as follows.
Male: y=18.83-0.15×age min.
Female: y=16.24-0.10×age min.
The gradual shortening of endurance time depending on age may result from the reducing of max. VO₂ with aging. With the real observed endurance time, regression equation may be applicable reversely to calculating the estimated age - "Standard Aerobic Age" -as an index for endurance.
3. In 108 healthy men, their heart rates were almost equal, responding to the equal work loads at the submaximal level without distinction of age except the 60s. Accordingly, % MHR (percent of maximal heart rate) gradually increased with aging for the equal work loads. It means the decrease of reserve of aerobic capacity with aging.
In Japan, there has been a few reports on the regression equation of the maximal heart rate and endurance time in healthy Japanese adults; especially there are very few reports on maximal exercise test in which subjects as healthy adults are carefully selected. Therefore results of this study have a great value of the practical application for the exercise examination and prescription for Japanese adults, and also have a great deal of social significance now in Japan.
DESCENTE SPORTS SCIENCE Vol.3/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
| Researcher | Hisao Iwane*1, Joji Fujinami*1, Toshikazu Minamidani*2, Masayuki Watanabe*3 |
|---|---|
| University or institution | *1 Tokyo Medical College, *2 Juntendo University, *3 Tokyo University of Arts and Sciences |
Keywords
exercise prescription, middle aged person, exercise tolerance, maximal exercise test, healthy Japanese adults