Start in a lunge position with knee in line with ankle. Staying low, bring back leg forward to tap the ground next to the front foot (almost in squat position here) then immediately return to lunge position to tap behind you. Be careful not to allow knee to bow inward or outward. Repeat on the same leg until the timer prompts you to switch legs.
Start a Program
Stop searching for workouts and start a program on Group HIIT with little to no equipment. Programs are specifically designed for each level and include hundreds of movements so you'll never get bored. Access cardio, abs and yoga videos in addition to program workouts.