If your core muscles are weak, you won't be able to breathe as deeply, lift as heavily, or m...

By Sarah Wassner Flynn

This eight-move series will leave no muscle unworked. For serious head-to-toe and front-to-b...

By Health.com

Spice up your workouts by trying something new in the pool. Here are 11 workouts that mix up...

By Margaret Cyphers

If you want to train by heart rate, there are several tools you need before you can get star...

By Jason Karp, Ph.D.

Don't let the onslaught of beginner training plans intimidate you. Here are three running pr...

By Jessica Sanders

New to running and wondering which diet will help you lose the most weight? Before you stock...

By Runner's World

Mix up your swim workouts and get faster. Here are six one-hour workouts that will keep you ...

By Margaret Cyphers

Bored with the same old indoor workouts? Try one of these four drills that will get you fit ...

By Bicycling

Toned abs look good, but they won't help prevent injury. This is why crunches and sit-ups ar...

By Jeff Gaudette

Are you ready to take the big jump to a 70.3-mile triathlon? Here's a breakdown of how much ...

By Gale Bernhardt