If you’ve ever tried them, you know side planks are challenging­—even more than regular planks. But they’re a critical move, says Keli Roberts, an exercise physiologist with the American College of ...

Some of the best exercises are only a minute or two but are the most grueling. They will make you sweat, shake, and possibly collapse at the end, but they will tone you up, build muscle, and whip you ...

Fitness fads may come and go, but there’s one aspect of strength training we can all agree on: a strong core never goes out of style - and for this, I'd recommend the side plank exercise every time.