Your muscles respond to demand, not weights — and when you understand how to create that demand using only your body, you can build real strength anywhere. Read on to learn how to create strength ...

While protein powders can be a convenient way to increase protein intake, they are not mandatory for muscle growth.

You might assume that you have to lift heavy weight to get stronger, but research shows that's not necessarily the case. You can make real strides using just your own body weight. NPR's Will Stone ...