To celebrate our Body Issue, we've kicked off a 30-Day Challenge designed by celebrity and Victoria's Secret Angels trainer Dan Roberts to boost our energy and fitness levels for all the summer happenings we plan to get into. 

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The move: Plank Tap

This exercise strengthens the anterior core, specifically the muscles that produce and control rotation. If you do any rotational sports such as tennis or golf, this one is for you.  

The difficulty level: It's a lot harder to keep your hips square than you think, so really focus on not moving them.   

The burn factor: 6/10

Join us in the fun and show us your progress by instagramming and tweeting us at @ELLEUK and @ELLFitTeam, using the hashtag #ELLEFit