Stand between two shoulder-high cable pulleys (adjustable cross-over machine). Grasp right stirrup with left hand and left stirrup with right hand. Step back until cables are angled back 30° to 45°. Position both elbows at height of shoulders, one over other.
Pull both cable attachments by moving elbows back to sides. Keep upper arms horizontal, perpendicular to trunk. Return and repeat.
Latissimus Dorsi becomes involved if elbows drop below shoulders.