Fitness can be fun and challenging, and the pumpRockr skateboard is proof of that. Because it's pivot-driven, you work your entire body, including your core, to make it go. And, because it's a skateboard, you'll have fun (and maybe even look cool) doing it!

This week, we're giving one away to a lucky That's Fit reader. Have you entered to win yet? If not, head over to the original giveaway post and leave a comment. But hurry -- you only have until Friday at 5 p.m. ET to enter!