Advanced kettlebell HIIT combines explosive strength work with high-intensity cardio for a demanding full-body workout.

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 ...

Plus, the surprising benefits of turning the intensity down a notch.

A recent study from Australia suggests that high intensity interval training may be optimal for body composition in older adults, by helping to lose fat while preserving muscle.

High-intensity interval training involves performing an all-out, exhaustive physical effort for a short time followed by a short (sometimes active) recovery. Its benefits are clear: Effective HIIT ...

Boost your endurance and strength, all at once.

Low-impact HIIT offers the intensity of interval training without the strain of jumping. This full-body, bodyweight workout ...

Every so often, a new type of workout seemingly takes the fitness world by storm. The latest in this long line of buzzy fitness fads: the Norwegian 4x4 workout, a high-intensity interval training ...

People who’ve had a stroke might worry about pushing themselves hard at the gym. New research suggests high intensity interval training (HIIT) can do more to improve fitness than moderate-intensity ...

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

Castle Hill Fitness in Austin redefines the gym experience with flexible memberships, recovery services, personal training ...

HIIT can help improve speed and power, but longer, steadier workouts that you can do regularly, like swimming and rowing, are ...