The runner's plank is an alternative I use as a certified trainer when sit-ups aren't possible, and this is exactly how to do the exercise.

Planks are a great exercise for your core and entire body. Here's how to do a few different types of planks to get the health benefits.

Planks are widely considered by fitness experts to be a fantastic exercise to strengthen the muscles in your core and elsewhere, no matter your age or physical fitness level. There are numerous ...

The world of fitness has crowned a new champion in core training, and it’s not the traditional sit-up. The plank, a deceptively simple exercise, has captured the attention of fitness enthusiasts ...

Over 45? Hold a forearm plank for 90 seconds with solid form—why it signals elite core strength and how to build up.

How to: Start in a modified pushup position (high or low) with each hand on a slider and knees on the ground. Slide one hand ...

Push-ups come in many forms — some are progressions to make a push-up harder while others are regressions to make the upper-body exercise more accessible. One push-up variation that holds muscles ...