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: Advanced Killer 

This whole body move is probably the hardest yet. Try to keep your balance and make sure the movements are powerful and explosive. 

The difficulty level: Keep going! The more reps the better. 

The burn factor: 10/10

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

Get more moves from Dan Roberts here