A jiffy bag donna sul viagra For this tricep kick-back exercise, use a dumbbell (or a can of beans). Put your right knee and right hand on a sofa. With the dumbbell in the other hand bring it close to your body, with your upper arm parallel to the floor. Aim to straighten your arm by bending from the elbow, keeping your shoulders still. Squeeze your arm as it straightens. Return your lower arm to the starting position. Exhale slowly, straightening your arms. Stretch the tricep. Now repeat on the other side.