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 revelry we plan to get into. 

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The move: Twisting Lunges.

Lunges are good for your glutes and legs, but when you rotate at the same time you engage your core and obliques and make yourself off balance, so all of the muscles in your ankles need to switch on to keep you stable.

The difficulty level: The first ten are a piece of cake, but once you hit 40 you'll start to feel it

The burn factor: 6/10

Join us in our 30 Day Get Fit Challenge fun and show us your progress by instagramming and tweeting us at @ELLEUK and @ELLFitTeam, using the hashtag #ELLEFit30