Hilary Walker Miller struggled with fitness until she began at-home workouts. Now, over 25 years later, here's how she keeps ...

As we age, our arms often pay for years of desk work, repetitive motions, and the slow creep of slumped posture. The result ...

This is a very painful injury, which causes the muscle to ball up near the shoulder and leads to intense bruising.

This dual cross-linking design lets the muscle switch stiffness on demand. In lab tests, its stiffness jumps from about 213 ...