If you're short on time but want maximum results, the bear plank may be one of the most effective core exercises for improving running performance, stability, and total-body strength.

The bear plank builds deep core strength and stability and engages most of your body, but you can turn this move into a hip-opening exercise, too, and burn up your quads at the same time. This is how.

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Shutterstock Forget ...

For the fastest way to join Tom's Guide Club enter your email below. We'll send you a confirmation and sign you up to our newsletter to keep you updated on all the latest news.

You can squeeze in some quick exercise during even the shortest of lunch breaks and still feel like you worked hard. Moves ...