Physiological effects on word performance of vapor-barrier clothing and full-face respirator

Work performance with impervious clothing and full-face respirator was investigated during maximal and submaximal (40-60%) bicycle ergometer efforts. Such levels may be dictated by the requirements of emergency decontamination tasks while most studies have been concerned with lower levels of activity. Five different exercise protocols were administered. Heart rate (HR), oxygen consumption (Vo2), skin (Ts) and rectal (Tr) temperatures were monitored. The impervious suits resulted in decreased work performance, aerobic metabolism, and tolerance time. Stress indices of HR and mean Ts were found to be correlated with these differences. The study is being expanded for the purpose of establishing safe physiological guidelines for work tolerances at higher energy levels in impermeable suits.