Learn more about this metric and the best training sessions to add to your schedule to boost your cardio fitness.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." RUNNERS CAN EASILY fall into a basic routine for their workouts: Lace up, hit the pavement, then cruise ...

As HIIT's popularity soars, sprint interval training, or SIT, is doing its best to catch up. Can shorter, harder, faster deliver better results? As the popularity of HIIT continues to soar, sprint ...

No longer can some military personnel rely solely on running at a moderate pace. Sprinting and agility are regularly tested as part of the ever-evolving fitness tests in the military. Many fitness ...

Many runners strive to get faster, and boosting VO2 max is often part of that goal. One way to achieve both: The interval ...