Working out doesn't just build muscle but, in later life, helps maintain a powerful cellular machine that repairs damaged ...

If exercise feels harder than it should, chronic stress may be working against you. Learn how to regulate your physiology so ...

Repeated exercise, or wasting, can change the way key genes work.

Medically reviewed by Michael Menna, DO Key Takeaways The circulatory system carries oxygen and nutrients throughout the body and removes waste.The lymphatic system helps fight disease by creating and ...