This exercise is great for biceps, back, upper body, and because of the squat position also for your legs and glutes. To perform it you will need an elastic band and a stationary object at stomach level. Wrap elastic band around door handle or something similar.
Get in squat position and make sure your knees do not pass your toes. Grab an elastic band with both hands. At that point keep your arms extended and parallel with the floor.
Slowly bring the elastic band to your body.