Hammer throwers and coaches alike often look at the right hand side of the body as the principle driving force of hammer throw technique, and with good reason. The right hand side through the double support phase drives the acceleration of the implement. However, as critical as an effective right hand side is, it is useless without correct technique on the left hand side. The following looks at the role of the left hand side on efficient hammer throw technique. It should be noted that the article is written from the perspective of the right handed thrower and left handed throwers will need to reverse the descriptions given.