高齢弓道家における左室形態と機能及び行射中の循環系応答
1990 年 22 巻 3 号 p. 46-56
詳細
1990 年 22 巻 3 号 p. 46-56
The purpose of this study was to investigate the cardiac dimensions and the influences of Kyudo practice in the function of the left ventricle and responses of cardiac function during shooting. The subjects were 14 shooters whose ages were 63-85 years (the average 68.8 years old) and even now they take part in formal Kyudo matches. Total body fat was assessed by the skinfold caliper method. The left venticular structure and function were measured using M-mode echocardiography and ECG during shooting were measured by the telemeter method. Results obtained were as follows.
Subjects averaged 161.9 cm in height,59.7 kg in weight and 123.4 mmHg in systolic blood pressure. Time for shooting was about 30 seconds on the average, but the shortest time was 15 seconds, and the longest was 50 seconds. There were arrhythmia in 3 subjects at rest ECG. However, there were no differences in the ecocardiographic data between shooters and normal subjects. Arrhythmia disappeared in two subjects during shooting. The heart rate during shooting averaged 110 b/min, but one shooter recorded 180 b/min at maximal level.
In summary, Kyudo practice is not so hard for old age shooters, but there is possibility that it builds up blood pressure, because it needs strong muscle activity during shooting. Therefore, old shooters must always take care of their medical condition.
