1) Attach a resistance band to a stationary object above head level. While facing the anchor, hold the ends of the band out in front of you with arms bent at a 90° angle. If you begin with the left arm, take one step back with the opposite (right) foot for balance and to maintain neutral alignment in your spine. Keep your back straight and core tight. 

2) While keeping your right arm stationary, pull the left arm down and back until it is fully extended and press it as far back as you can to fully contract the tricep muscle.

3) Return to the starting position and repeat to complete a set. Change leg positions and complete a set with the opposite (right) arm.