Popsugar Fitness Strength Training 7-Minute HIIT Workout All You Need Is a Wall and Chair For This 7-Minute HIIT Workout April 5, 2022 by Jenny Sugar View On One Page Photo 9 of 13 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 9 High Knees/Running in Place Hold your hands at waist level. Hop the right knee up toward your hands, then quickly switch legs and hop the left knee up. Continue running in place for 30 seconds. Previous Next Start Slideshow Strength TrainingBodyweight WorkoutsHIITInterval Workouts10-Minute WorkoutsIntermediate WorkoutsFull-Body Workouts