When you were growing up, you probably had a growth spurt or two. All of a sudden ... we begin to lose muscle strength pretty rapidly — about 1% of muscle mass per year, a deterioration which ...

But now I’ve been hearing that we actually go through a couple of spurts where we age really ... In middle age, people often begin to get muscle injuries and see a marked increase in body ...

According to research published by Nature Aging, these growth spurts occur at ages 44 and 60 ... On both occasions, there are ...