Squat with movement
Sit down and push out both knees at the same time. Take a big step to the side with your right foot, followed by a small step with your left, still with a tension on the band. Try to keep your chest up/forward. Continue with a few steps to the right, before changing direction.
Ready for a new challenge? Walk out with your hands to a plank with the arms stretched out in front of you. Now walk with your feet towards the hands and start over again. Try to keep the arms and legs as straight as you can and the hips still throughout the whole movement.