PROCEDURE TO ASSESS ENERGY EXPENDED DURING A SHORT-PERIOD TASK
Final rept. May-Aug 1964
AIR FORCE AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OH
Pagination or Media Count:
A procedure was developed to measure the energy expended in a rowing task completed during a 12-second zero-G parabola. The technique was based on completed expired air samples. The subjects expired air was collected under three conditions 1 30 seconds of rest, 2 12 seconds of rowing, and 3 15 seconds of recovery. The conditions were repeated 10 times, and the subjects expired air was cumulated separately in three bags to obtain, in essence, a 5- minute collection for rest, a 2-minute collection for work, and a 2-12 minute collection for recovery. This procedure was replicated in four environments laboratory, aircraft 1G level flights, aircraft 2G-1G-2G bank maneuvers, and aircraft 2G-0G-2G parabolic maneuvers. The results showed that the body reacted to a change in physical activity and returned to a state of equilibrium much more quickly than previously reported in the literature. The volumes of expired air, oxygen, and carbon dioxide in each condition rest, work, and recovery were similar in the four environments, but the specific effects, if any, of the differential gravity levels were negligible and unsystematic.
- Stress Physiology