High-Intensity Training May Prevent Astronauts' Muscle Loss Squats stopped muscle wasting in simulated experiment    HealthDayNews -- High-intensity resistance training may help astronauts maintain muscle strength and size during long space voyages, according to a new study.    The study, published in the Journal of Physiology, included 12 volunteers confined to their beds for 84 consecutive days in order to mimic the effects of living in a zero-gravity environment...