1) Sit on the floor with your legs crossed. Sit up tall with your back straight.
2) Hold the weights so that your palms are in. Extend your arms over your head, with your elbows slightly bent.
3) Holding your upper arms still, slowly bend your elbows so that your hands lower to shoulder level. Do not let them dip further back behind you.
4) Raise the weights back up to the starting position and repeat, doing two sets of 8-12 reps each. Rest for 15 seconds between sets.