運動測驗評估飛行生G耐力的研究

A Study of Physical Tests Used for Evaluating +Gz Tolerance of Student Pilots

蔡玉敏(Yu-Ming Tsai) ； 溫德生(Te-Sheng Wen)

《中華民國航空醫學暨科學期刊》 20卷1期 (2006/06) Pp. 5-12

https://doi.org/10.7011/JAMSRC.200606.0005

摘要

Introduction: The purpose of this study is to determine which of aerobic power and anaerobic power will be suitable for predicting +Gz tolerance of student pilots and establish a model for physical conditioning. Methods: The subjects were 59 male student pilots with average age of 24.7±0.8 years and had passed the original phase of human centrifuge training. Their relaxed+Gz tolerance (Gr) and straining +Gz (Gs) tolerance of gradual G onset profile were recorded. Based upon the previous maximum G, they were divided into group 1 (N=43, ≧8Gz ) and group 2: (N=16, ＜8Gz). Supine resting heart rate, height, body weigh and BMI were determined in both groups. Afterward, 21 and 11 subjects in group 1 and group 2 underwent aerobic power evaluation using 3-minute step test and 12-minute run-walk test. Besides, 22 and 5 subjects in group 1 and group 2 were challenged with squat and bench press (1 RM) for evaluating their anaerobic power. Results: We found that negative correlation between Gr and height probably due to heart to eye/brain distance and statistically significant positive correlation between Gr and body weight as well as BMI. Besides, Gr and Gs positively correlated with maximun muscular strength. The results indicate that weight training may increase lean body weight, optimize anti-G straining maneuver, and retain baroreflex activity, which promote +Gz tolerance. We also found that resting heart rates correlated negatively with Gr and Gs. Therefore, it is conceivable that the insensitivity of baroreflex may reduce the neural responsiveness of the heart and retard the development of late maximum heart rate during +Gz stress. Conclusion. The physical conditioning program for student pilots shall consist of regular weight training and moderate aerobic exercise. Specialized devices are needed for evaluating the physical fitness.

關鍵字

+Gz耐力 ； 體適能 ； 有氧能力 ； 無氧能力

並列摘要

Introduction: The purpose of this study is to determine which of aerobic power and anaerobic power will be suitable for predicting +Gz tolerance of student pilots and establish a model for physical conditioning. Methods: The subjects were 59 male student pilots with average age of 24.7±0.8 years and had passed the original phase of human centrifuge training. Their relaxed+Gz tolerance (Gr) and straining +Gz (Gs) tolerance of gradual G onset profile were recorded. Based upon the previous maximum G, they were divided into group 1 (N=43, ≧8Gz ) and group 2: (N=16, ＜8Gz). Supine resting heart rate, height, body weigh and BMI were determined in both groups. Afterward, 21 and 11 subjects in group 1 and group 2 underwent aerobic power evaluation using 3-minute step test and 12-minute run-walk test. Besides, 22 and 5 subjects in group 1 and group 2 were challenged with squat and bench press (1 RM) for evaluating their anaerobic power. Results: We found that negative correlation between Gr and height probably due to heart to eye/brain distance and statistically significant positive correlation between Gr and body weight as well as BMI. Besides, Gr and Gs positively correlated with maximun muscular strength. The results indicate that weight training may increase lean body weight, optimize anti-G straining maneuver, and retain baroreflex activity, which promote +Gz tolerance. We also found that resting heart rates correlated negatively with Gr and Gs. Therefore, it is conceivable that the insensitivity of baroreflex may reduce the neural responsiveness of the heart and retard the development of late maximum heart rate during +Gz stress. Conclusion. The physical conditioning program for student pilots shall consist of regular weight training and moderate aerobic exercise. Specialized devices are needed for evaluating the physical fitness.

並列關鍵字

+Gz tolerance ； physical fitness ； aerobic power ； anaerobic power