Stand tall with your feet hip-width distance apart. Bend your elbows at your sides or rest your hands on your hips.
Step forward with your right foot, lowering your hips until both knees are bent at about a 90-degree angle. Keep your front knee directly above your ankle, and lower your left knee to just above the floor.
Keep the weight in your heels as you push back to the starting position.
Repeat stepping with your left foot this time, completing one rep.
Keep alternating for 45 seconds, then take a 15-second rest.