This exercise is good for upper body, triceps and arms. To perform it you will only need elastic band and a chair.
Put the elastic band underneath your chair. Sit on the chair and firmly grab both ends of elastic band. Your arms are out to the sides and forming 90 degree angle.
Raise your arms to full extension. Slowly lower the band to a starting position.
Exhale as you raise your arms, and inhale as you return to starting position.