All it takes is a tweak or two, and virtually any exercise for any muscle group can instantly become a core movement as well. It's all about positioning. One great example of this is the V-sit ...

To chisel your abs and strengthen your core, add some dumbbells to your core workout. Adding some weight forces the fibers in ab muscles to activate more fully, making each rep more effective. This ...

Incorporating SIT sessions into your fitness routine can help boost your cardiovascular health and athletic ability. Emilija Manevska via Getty Images If you’ve dabbled in fitness in recent years, you ...

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 ...

Workouts You just need 10 minutes and a resistance band to sculpt your abs with this 4-move home workout Workouts No reformer? No problem: Build full-body strength with just a Pilates ball and these 5 ...

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 ...