Place the band just above your knees.
Stand with your feet hip-width apart, with your hands at your chest or on your hips.
Bend your knees and push your butt back to lower into a squat.
Stand back up and lift your right leg out to the side, keeping your knee straight.
Return your right leg to the floor.
Squat again. This time when you stand back up, lift your left leg out to the side, keeping your knee straight.
Return your left leg to floor. That's 1 rep.
Do reps, alternating sides.
Keep your core engaged and make sure your chest is lifted and that you're not rounding or arching your back.