Effects of Weight Lifting on Intrathoracic Pressures Generated by Anti-GStraining Maneuvers

摘要

The purpose of this study was to assess the effects of physical fitness programon 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 mm Hg and 167 mm Hg for the experimental and control groups respectively. After 6 weeks of exercise and AGSM training, mean IP for the experimental subjects was 213 mm Hg (26% increase). After 3 weeks of AGSM training, mean IP for the control group was 202 mm Hg (21