Add Yahoo as a preferred source to see more of our stories on Google. 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 ...

Sure, holding a straight line isnt as exciting as bicycle crunches -but itll make you more functional both in the gym and out. Side planks are all about strengthening the side body and stabilizing ...

A staple of many core workouts, most runners will be familiar with the side plank exercise. But you may be surprised to learn that it's one of the best exercises you can do for working your deep core.

Jakob Roze, CSCS, is a health writer and high-end personal trainer. He is the founder and CEO of RozeFit, a high-end concierge personal training practice and online blog. Side planks trains your ...

PLANKS ARE ABOUT as straightforward as an exercise gets. You brace your core, squeeze your glutes, and hold your position for ...

The plank is one of the most commonly performed core-strengthening exercises, and whether you're getting your heart-rate up at Barry's or at home (using a Class FitSugar video, per chance??), there's ...

“Engage your core” is a common cue in exercise classes, but core activation is actually a pretty automatic process. In fact, during most movements, your core muscles naturally activate to stabilize ...

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. We last saw Copenhagen ...