Good posture sets the foundation for a good turn in the golf swing. To achieve this, Tillery says he wants Straka to align his knees and shoulders over the balls of his feet. Stacking his joints in a straight line like this allows for maximum stability and balance.

Straka constantly checks the position of his hands on the takeaway, making sure they stay in line with the middle of his chest—a sign that his arms, legs, and chest are all in sync and turning together off the ball.

Straka's shaft and lead leg are virtually parallel to one another here. Tillery says this is a useful checkpoint to remember, and an indication of a good takeaway.

Straka works hard on making sure he turns his arms to the top of the backswing using his body and not by lifting his arms. If his body stops turning but his arms keep moving, that’s a sign Straka’s golf swing is becoming disconnected, Tillery says. It might be a way to add power, but often at the expense of consistency.

Tillery says this is Straka's magic move. Syncing the movement of the golfer's arms with his body keeps his arms in front of his body in the early part of the downswing. From there, Straka can drive his legs forward without getting his arms stuck or flying open, a common mistake among amateurs.

Tillery says Straka's feet are working in the correct direction here, meaning his trail foot is pushing towards the target, and his lead foot is pulling behind him. Pushing and pulling against the ground like this is how top pros rotate hard and stay centered without spinning too open.

Power comes from having the correct handoffs in your swing, Tillery says. That means different parts of your body are firing in the right order: lower body, upper body, arms, wrists, then clubhead. There aren't any crazy contortions in his body here, and notice how his clubhead is in alignment with his left arm. All the handoffs have been timed up to perfection.

Notice how the right knee is chasing towards the left. Tillery says this is a good sign that things are still moving in the right direction towards the target.

Straka's mindset is that extra power won't need to come from lengthening his backswing. He recognizes if he focuses on generating speed from proper technique, the extra yards will follow.