COUNTERACTING EFFECTS OF PHYSICAL EXERCISES PERFORMED DURING PROLONGED PERCEPTUAL DEPRIVATION.

Subjects who were required to perform physical exercises during a week's exposure to unpatterned light and white noise showed fewer impairments on 15 behavioral measures than did subjects who were not required to exercise during the same 'period in an isolation chamber. Furthermore, fewer hallucinatory phenomena and fewer disturbances of the electroencephalogram were observed.