High-intensity interval training (a.k.a., HIIT) is a triple threat: “It’s quick, easy, and effective,” says Angela Gargano, a certified trainer and creator of Strong Feels Good & Pull-up Revolution.

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 ...

As women enter their 40s and beyond, hormonal changes can make it harder to build muscle, maintain energy, and manage body ...

Fitness gurus and weekend warriors alike are sold on the benefits of high-intensity interval training (HIIT). The research is clear: Break your training into high-intensity spurts of activity followed ...

HIIT may offer the same health benefits as regular exercise in less time and help reduce body fat, heart rate, and blood pressure. It may even help improve blood sugar levels and insulin sensitivity.

Alex Hutchinson is a National Magazine Award-winning journalist and Outside’s Sweat Science columnist, covering the latest research on endurance and outdoor sports. New perk: Easily find new routes ...

The benefits of HIIT include burning calories, losing weight, and building muscle. HIIT can also help you lower blood pressure and blood sugar, while improving oxygen and blood flow. HIIT may also ...

High-intensity interval training (HIIT) is a cardiorespiratory training technique that involves short bursts of intense exercise followed by even shorter rest periods. You repeat this cycle several ...

When I'm planning my fitness routine, my goal is not to spend as much time as possible sweating. It's exactly the opposite. I want to be ultra-efficient in the gym or my living room and get on with my ...

Directions: Warm up for a few minutes with dynamic stretches and some light cardio such as jump roping or lateral shuffles. The workout is broken up into three circuits, all of which have three ...

Which exercise is superior for improving mitochondrial functioning? Which exercise results in the most dramatic positive ...