How to do it: From a high plank (hands under shoulders), bring one hand to touch the opposite shoulder, keeping your hips as still as possible. Alternate sides.

This three-minute plank challenge, set by Anne Hathaway's trainer Monique Eastwood, sculpts your core in just one move.

Challenge your whole body with this plank challenge that uses active recoveries to improve performance and increase muscle endurance.

The common mistakes people make when performing the seated toe touch Most people don't think of stretches as an exercise they need to work on like say a plank or a squat.

The common mistakes people make when performing the seated toe touch Most people don't think of stretches as an exercise they need to work on like say a plank or a squat.

This six-move plank workout takes 10 minutes and strengthens all the core muscles with zero equipment and trainer fave plank variations easy to do at home.

In today's workout, you'll alternate every other move in a plank position. You'll start with triple climbers, then stand for the star toe touches. Go back to that plank position for up-down planks ...

Add difficulty to the plank exercise for elite core strength and rotational control. Try the “toe tap” when you're ready for a real challenge.

This plank challenge from trainer Heather Robertson is under five minutes (and the whole video is under seven). You can definitely squeeze it in today!

If you are looking for a routine that can help you with the demands of rucking or other load-bearing activities, consider this moderate-intensity workout idea.