Every year when the ice begins to thaw and spring turns the corner, you realize it's time to shed that winter flab and get your beach body whipped into shape just in time for summer.

And what says you're ready to hit the surf better than a pair of washboard abs? Answer: Nothing.

This core-crushing fitness test will jump-start your warm-weather training with five relentless rounds of abs-focused exercises. Kick things off with reverse crunches and barbell rollouts, and finish with a pair of hanging windshield wipers and lying medicine ball passes that'll have your muscles feeling the heat.


Complete 5 rounds of the exercises below. Take 2 minutes rest between rounds.

Wyatt Krueger, a CrossFit Level-1 coach, owner of CrossFit Amherst, and expert contributor to Men's Fitness and HUMANFITPROJECT, demonstrates the moves.

This routine is part of our video feature on the 10 kickass CrossFit-inspired workout challenges to test your limits. Check out the whole series here.