Popsugar Health & Fitness Crossfit 20-Minute CrossFit Workout CrossFit and HIIT Married, and This 20-Minute Fat-Burning Workout Was Born 17 August 2018 by Jenny Sugar View On One Page Photo 1 of 2 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Push Press Hold a dumbbell in each hand just above the shoulders, palms facing in. Bend the knees slightly and as you straighten your legs, use the force from your legs to press the dumbbells above you, straightening the arms. Bend the elbows coming back to the starting position to complete one rep. Keep going for 40 seconds. Take a 20-second rest and transition to the bike. Previous Next Start Slideshow CrossFitWorkouts