Calf muscles play a very important role in the antigravity
muscle. If calf muscles atrophy, their function as a muscle pump is weakened, encouraging the possible formation of clots in the deep veins in the lower leg. Moreover, there may be a drop in the basal metabolic rate since the muscles in the calf are relatively large. Accordingly, it is important for the human species to examine how to maintain the function and size of the calf muscles during microgravity.