The Fit List

I spoke to top ultrarunners, athletes and endurance experts – here's how to never give up again.

Forget guesswork. By understanding these five heart rate zones, you can optimize every workout and experience maximum results.

I talked to Barry's Bootcamp fitness pros and this is what they had to say about improving treadmill workouts.

I used to run marathons, but now I'm hitting the gym again: here are the 5 north star rules I'm using.

The best apps to help you lift weights, pack on size and add strength.