Plus, which move is more effective for strong abs.

Say goodbye to sit-ups and crunches, do this instead.

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 ...

Want to run better? Stop doing sit-ups – here are five expert-recommended functional core movements to do instead.

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 ...

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 ...

Fitness ‘I’m a Pilates teacher and these are the 6 core exercises I truly love and recommend for all ages and all levels’ Workouts I’m a personal trainer who works with seniors: These are the 4 core ...

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 ...

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 ...