The plank works the entire body — the core, abs, arms, back, shoulders, glutes and lower body, and it can help with back pain. I recommend that my clients include this low-impact exercise regularly in ...

How to do the perfect side plank, and how to make it easier (and harder). Planks are hard. Even just 30 seconds in plank position can feel like an eternity. But as challenging as planks are, side ...