Popsugar Fitness Workouts Reebok Beach Workout This 15-Minute Beach Workout Will Burn Every Part of Your Body July 21, 2017 by Jenny Sugar View On One Page Photo 4 of 7 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 4 Sunscreen Bicycle Crunch Lie on the ground and perform crunches, alternately bringing your knees in toward the chest. As the knee comes in, pass the sunscreen bottle back and forth in between your legs. Continue for 90 seconds. Previous Next Start Slideshow WorkoutsReebokCrossFitIntermediate WorkoutsFull-Body Workouts