A plank is more difficult than it looks. You have to use all of your muscle groups, including your core, abs, arms, back, shoulders, glutes and legs. It’s normal to struggle to do a plank. Many of my ...

A physical therapist explains how a modified side plank with a clamshell strengthens runners’ core and hips to improve efficiency and reduce injury risk.

Planks and push-ups can be intimidating, but this modified push-up and plank workout can help you ease into the moves by introducing variations that can be both progressed and regressed. That’s where ...

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 ...

Why one trainer calls the plank variation "no joke." ...

While the standard plank is widely incorporated into core workouts, the side plank is often overlooked. This variation of the plank targets the obliques, the muscles that run along the side of your ...