This functional squat variation is becoming a favorite among fitness experts because it strengthens the legs, protects the ...

Add Yahoo as a preferred source to see more of our stories on Google. Incorporating SIT sessions into your fitness routine can help boost your cardiovascular health and athletic ability. Emilija ...

Grab a chair and try this ...

Core workouts can often feel like a slog, especially when the workout involves busting out endless sit-ups or crunches, which can quickly become repetitive and boring. However, this workout from Oner ...

This ridiculously hard L-sit exercise works your entire body without moving a muscle. These are the progressions you can use to get strong enough to do it. Everyone likes a good challenge. That’s why ...

60-second fitness test after 60 reveals strength, balance, and stamina, with certified trainer tips to improve fast.

For those who live to sweat — but maybe want a chance to fully catch their breath — SIT is the new HIIT. HIIT, or high-intensity interval training, includes bursts (typically 30 seconds to a few ...

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 ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Sprint interval ...