Office of Aerospace Medicine Technical Reports
FAA Office of Aerospace Medicine
Civil Aerospace Medical Institute
Report No: DOT/FAA/AM-82/10
Title and Subtitle: The effects of physical fatigue and altitude on physiological, biochemical, and performance responses
Report Date: May 1982
Authors: Higgins EA, Mertens HW, McKenzie JM, Funkhouser GE, White MA, Milburn NJ
Abstract: Twelve healthy young men were evaluated in each of four experimental conditions involving the possible combinations of two exercise conditions given prior to performance testing (1 h of heavy exercise vs. no exercise) and two altitude conditions (ground level vs. 12,500 ft) which were administered during performance testing. Performance was measured during a 2 1/4-h test session with the Multiple Task Performance Battery (MTBP) which involved time-shared performance in monitoring of warning lights and meters, mental arithmetic, problem solving, and tracking.
Heart rate was statistically higher after exercise than after no exercise and statistically higher at 12,500 ft than at ground level. Norepinephrine excretion was higher during exercise experiments than during no-exercise experiments. There was no altitude effect for this measurement. The overall composite score of MTPB performance was significantly lower at 12,500 ft than at ground level. The adverse effect of higher altitude was greatest in the tracking task. The 1-h period of vigorous physical exercise had no statistically significant main effect on overall MTPB scores.
Residual effects of exercise resulting in increased arousal may account for the tendency for performance to be slightly higher in the case of problem solving. The interaction of altitude with exercise was also significant in the case of tracking performance. The most important aspect of the interaction was that tracking performance was significantly better at 12,500 ft following exercise.
Key Words: Aviation environment, Simulation, Hypoxia, Physical fatigue, Complex performance, Physiology, Biochemistry, Physical exercise
No. of Pages: 24
Civil Aerospace Medical Institute
Report No: DOT/FAA/AM-82/10
Title and Subtitle: The effects of physical fatigue and altitude on physiological, biochemical, and performance responses
Report Date: May 1982
Authors: Higgins EA, Mertens HW, McKenzie JM, Funkhouser GE, White MA, Milburn NJ
Abstract: Twelve healthy young men were evaluated in each of four experimental conditions involving the possible combinations of two exercise conditions given prior to performance testing (1 h of heavy exercise vs. no exercise) and two altitude conditions (ground level vs. 12,500 ft) which were administered during performance testing. Performance was measured during a 2 1/4-h test session with the Multiple Task Performance Battery (MTBP) which involved time-shared performance in monitoring of warning lights and meters, mental arithmetic, problem solving, and tracking.
Heart rate was statistically higher after exercise than after no exercise and statistically higher at 12,500 ft than at ground level. Norepinephrine excretion was higher during exercise experiments than during no-exercise experiments. There was no altitude effect for this measurement. The overall composite score of MTPB performance was significantly lower at 12,500 ft than at ground level. The adverse effect of higher altitude was greatest in the tracking task. The 1-h period of vigorous physical exercise had no statistically significant main effect on overall MTPB scores.
Residual effects of exercise resulting in increased arousal may account for the tendency for performance to be slightly higher in the case of problem solving. The interaction of altitude with exercise was also significant in the case of tracking performance. The most important aspect of the interaction was that tracking performance was significantly better at 12,500 ft following exercise.
Key Words: Aviation environment, Simulation, Hypoxia, Physical fatigue, Complex performance, Physiology, Biochemistry, Physical exercise
No. of Pages: 24
Last updated: Friday, June 1, 2012