This is one of my very favorite Boot Camp exercises. It really works your arms and core:

Here’s how to do it:

Get into a low plank position, weight on your forearms and toes, back flat.

Now, straighten your arms out until you are in a high plank position.

Then come back down.

I like to do these for time, alternated with a lower body exercise, like squats. Pairing exercises like this REALLY increases your metabolism, plus it allows you to get much more done during your workout!

Give these Up Down Planks a shot in your next workout and let me know what you think!