[Human motor activity during its artificial restriction]

During a prolonged exposure to an altitude chamber (37-120 days) man's motor activity decreases 3- or 4-fold: from 15-19 thous. to 2-4 thous. steps per day. During a prolonged restraint in a chair in the position of "an average physiological rest" the number of movements falls to 5-7 per hour. The change of motor activity during hypodynamics and recovery follows three stages: an acute change, a slow change, and a stage of stabilization at a new level. It has been shown that the people who find themselves in an environment limiting their physical activity do not have the need for an additional workload.