Here’s how far you can get without picking up any weights.

If you interpret muscle soreness as a sign that your muscles are growing, you're misreading the signals, according to exercise scientist Pak Androulakis-Korakakis, Ph.D. "You don't need to be sore to ...

Achieving strong, defined arms or legs is about more than just lifting weights. A ton goes into growing your muscles—and that includes proper nutrition, recovery, and working out in a specific way.