Abstract: The purpose of this study was to assess the effects of physical fitness program on the ability to perform an anti-G straining maneuver (AGSM). We used mouth-generated intrathoracic pressure (IP) as an index of effectiveness of the AGSM. We compared changes in IP in experimental subjects who performed the AGSM 5 times per week and participated in a weight lifting exercise program to IPs in control subjects who performed the AGSM 10 times per week and did not participate in a weight training program. Initial mean IPs were 169 mmHg and 167 mmHg for the experimental and control groups respectively. After 6 weeks of exercise and AGSM training, mean IP for the experimental subjects was 213 mmHg (26% increase). After 3 weeks of AGSM training, mean IP for the control group was 202 mmHg (21% increase). The difference in pre- and post-IPs between groups was not significant, but both groups significantly increased their IPs with training. Multiple linear regression analysis showed that pulmonary vital capacity and the strength of several muscle groups were significant predictors of IP in the experimental group. We conclude that strength and anaerobic fitness may be important for the performance of an effective AGSM. However, the AGSM training alone appeared to improve the performance of the AGSM as indicated by the increased IPs. Acceleration, Fitness, Straining Maneuver, Weight lifting, Intrathoracic pressure
| Limitations: |
 APPROVED FOR PUBLIC RELEASE |
| Pages: |
19 |
| Report Date: |
1994 |
| Report Number: |
A156382 |
|
|
|
|
Keywords relating to this report:
