Stand up straight near a wall, and stretch out your arm out against the wall. Your arm should form a 90 degree angle with your body.. Cross your legs, with the one closest to the wall behind the other. Keep your shoulders and body straight (throughout the exercise) and slowly lean in towards the wall by bending your elbow, until there is a 90 degree angle between your forearm and your biceps. Gently push yourself back up to standing position. Do one series of 5 repetitions and then alternate sides and execute the move with your other arm.
This exercise works your arms.