Prop the right foot on a step or platform, resting the right forearm on the thigh to support the back, or allowing the arm to drop directly below the shoulder. Hold a weight in the left hand and pull the elbow up to torso level. Keeping the elbow in that position, extend the arm behind you, focusing on contracting the triceps muscle.

Extend both arms fully, then exhale and slowly lower the weight, bringing the weight behind the head by bending at the elbows. Be sure the chest stays aligned over the hips and the back does not arch. Inhale and reverse the movement once you reach a 90-degree bend at the elbow or slightly further, lifting the weight back to the starting position.