This express full-body HIIT workout uses weights and a no-repeats format to deliver maximum power and efficiency in minimal time. Designed to build strength, boost conditioning, and keep intensity ...

This full-body HIIT workout is designed to burn fat, build muscle, and increase strength efficiently. By combining ...

High-intensity interval training is one of the best ways to pack a lot of exercise into a short period of time. HIIT workouts are so efficient because they alternate short bursts of very intense ...

Plus, exactly how to get results from whatever activity you love to do.

In 1996, Dr. Izumi Tabata published a groundbreaking study on high-intensity interval training, or HIIT, and its effects on aerobic (VO₂ max) and anaerobic capacity in young, physically active men ...

Burpees are a popular exercise, but they can put a lot of stress on your joints. You can swap burpees for other lower-impact ...

For your speed workout, try a fartlek run/walk: After a walking or easy running warmup, run hard for 30 seconds or as long as ...

When you drink a protein shakes doesn't matter as much as how much protein you consume. Here's the latest research and expert ...

Low-intensity exercise is thought to be better for keeping this “stress hormone” in check. But scientists say cortisol plays a crucial role in fueling your workout. Often called the “stress hormone,” ...