Exercising is easier for people who have worked out earlier in life. A new study shows that muscles retain a memory of their former fitness even as they wither from lack of use. Musucles seem to have both long and short term memory.The memory is stored in the cells of the muscle. Muscle cells are huge. Because the cells are so big more than one nucleus is needed to supply the amount of protein needed for muscular strength. When you exercise muscle cells get even bigger by merging with satellite cells. Previously researchers thought that when muscles atrophy, the extra cells that had merged would be killed off. A new study suggests that the nuclei do not die-which means.
