In three months, he could stand unassisted for longer periods, and do deep knee bends. In six months, he was much as he is now, his strength and energy about 75 percent of what it was before he fell ill. ###>In three months, he could stand unassisted for longer periods, and do deep knee bends. In six months, he was much as he is now, his strength and energy about 75 percent of what it was before he fell ill.