Popsugar Health & Fitness Hiit Workouts 20-Minute HIIT Workout For Small Spaces You Can Do This 20-Minute HIIT Workout Anywhere and Burn Major Calories 11 November 2019 by Emilia Benton View On One Page Photo 4 of 8 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 4 Lunge Jump Take a step forward and lunge, lowering your back knee until it's just above the ground. Spring upwards and alternate your legs mid-air so that your back leg is now in front of you, and your front leg is behind you. Once you've landed, lunge again, bringing your back leg as close to the ground as possible. Focus on jumping as high as you can without injuring yourself. Previous Next Start Slideshow HIIT Workouts20-Minute WorkoutsHIITWorkouts