Place the middle of the resistance band under the balls of your feet and stand with the band ends in hand. Begin with your body erect and chest up creating a neutral spine. Raise your arms up to your sides with your hands at head height. Prevent your knees from locking out and raise your heels up as high as you can while balancing on the balls of your feet. Drop your heels back to the floor slowly and allow your feet to rock back slightly. Proceed to raise your heels all the way up again and repeat. Control your movement through the entire range of motion.