If treadmill boredom is an issue for you, I think you’ll find that you can convince yourself to hop on the belt for this ...

High-Intensity Interval Training (HIIT) dominated the fitness industry for years. It worked on a simple principle of more results in less time. From quick 20-minute fat-burning sessions to ...

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

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

Take your fitness to the next level with this advanced HIIT workout—no equipment needed, no repeats, just full intensity to ...

Lungs burning, legs ceasing up – no one actually enjoys interval training. Pushing through the pain is the only way to unlock faster PBs and achieve a higher level of fitness ...

Plus, the 80/20 rule for optimal results ...

Burn calories quickly with this full-body HIIT workout, designed to get results without the need for equipment. Get fit and ...

Gains ahead.

Over the past few years, the fitness world has undergone a quiet revolution, trading the all-or-nothing burn of a high-intensity routine for a data-driven focus on wellness and longevity. Whether ...

HIIT once boosted your fitness, now it leaves you shattered. Learn how experts suggest balancing Zone 2 and intervals for women over 40.

Runners, you've gotta lift. And lifters, sets of 10 do not count as cardio.