Popsugar Fitness Workouts Which At-Home Exercises Can Help With Weight Loss? 20 At-Home HIIT Exercises — and How to Build Your Own Killer Workout January 26, 2019 by Jenny Sugar View On One Page Photo 3 of 20 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 3 High Knees Run in place while lifting your knees high to the level of your waist. Engage your abs as your knee comes up. Pump your arms to warm up your upper body. Previous Next Start Slideshow WorkoutsWeight LossHIITDumbbell ExercisesHIIT WorkoutsDumbbell Workouts