234 PHYSICAL FITNESS TESTS 



RESULTS 



The data from the seven subjects are presented in Table 18. The pre-exercise heartbeat 

 rates and ventilatory rates either declined (SH,SO,ME) or remained fairly constant (CO, BU, 

 LY, WE) during the 9 days of the tests in Sealab. The response to the test exercise was un- 

 changed in all subjects except two (SH, CO) who showed some reduction in post-exercise heart- 

 beat rate when the first two and last two test scores are compared. 



DISCUSSION 



From these data it may be concluded that exercise tolerance did not deteriorate during 9 

 days in the Sealab n environment. If fatigue was present it was either not of the type, or not of 

 sufficient magnitude to affect physical work performance. 



