How Exercising Into Old Age Can Keep Your Immune System Young

Exercise, even in old age, is known to have a wide range of health benefits, from preventing disability to slowing memory decline. But a new study reveals that it can also protect the immune system.

In the study, published in the journal Aging Cell, researchers looked at 125 very active adult cyclists who were between ages 55 and 79. The researchers analyzed their blood for markers of T-cells, which are known to help the immune system fight infections.