Really want to get into the deepest parts of your core? How about a plank? There are difficult varieties like the hardstyle plank and eight-point plank, a favorite of pro surfer Lakey Peterson. There ...

The plank challenge is a 30-day program to strengthen the core and build up endurance. Each day of the challenge, you’ll gradually increase the amount of time that you hold a plank. By day 12 of the ...

This 30-day challenge is designed to help you progress the amount of time you can hold a plank position, essentially by holding a standard plank for longer periods. But it also helps by challenging ...

You've probably seen online challenges, friends trying it, or simply heard that "planking is the best for abs." But what really happens if you decide to take it a step further and commit to doing a ...