High-Intensity Training

Here are nine common signals you should pay attention to and what they mean when you experience them.

If you train slower as you age, you are likely to lose performance at a greater rate per decade than if you train fast.

This exercise is accepted as one of the best full-body strengthening moves, particularly for runners.

Want to run a better marathon? Train the ZAP Fitness way.

Tony Horton's program wasn't originally meant for runners, but it certainly has its benefits!