At Yale, he’ll be building upon his research into the benefits of exercise for the immune system, especially during aging. Kent Langston: In the context of aging, people that exercise regularly are more resilient. They typically have higher muscle mass, their muscles have more “furnaces” called mitochondria [which generate energy], and they’re more resistant to fatigue. The same thing is true for your immune system. Langston: Yale is the perfect place for establishing my lab.