Popsugar Health & Fitness Crossfit 30-Minute CrossFit HIIT Workout Build Strength and Endurance With This Heart-Pumping 30-Minute CrossFit HIIT Workout 21 September 2019 by Jenny Sugar View On One Page Photo 1 of 6 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Burpees Lower into a crouching squat with your hands on the floor. Do a squat thrust by jumping your feet back into a plank position. Do one basic push-up, bending the elbows and then straightening back to a plank. Jump the feet forward to the hands, and come into a squat. Do an explosive jump straight up, getting as much height as you can. Do as many burpees as you can for 40 seconds, followed by a 20-second rest. Previous Next Start Slideshow CrossFitWorkouts