On every cell there are whats called telomeres. Everytime a cell replicates it loses a telomere. When all the telomeres are gone from a cell line they die off, forever. Exercise adds telomeres to cells and is the only thing that can. In short, excercise prolongs life. Additionally muscle cells don’t need insulin for uptake of glucose and can take glycogen for energy uptake, using muslce decreases insulin resistance. However: excercise initially can also throw your bg out thanks to cortisol and co. So it can be difficult until you get into a routine.
