Shoulder Turn
Also known as: upper body rotation, thoracic rotation
Shoulder turn is the rotation of the thoracic spine and shoulders during the backswing. A full shoulder turn (near 90°) is the primary source of swing arc and coil — the engine of a powerful backswing.
Rotating the lead shoulder under the chin while the hips resist produces the coil (X-factor) that stores energy. Without sufficient shoulder turn, golfers compensate with an arm lift (narrow, steep arc) or reverse pivot. Thoracic spine mobility is the physical limiting factor for shoulder turn in many amateur golfers — poor rotation in the upper back restricts turn and forces compensations elsewhere. It should not be confused with shoulder tilt, which describes the spine angle, not rotation.
Example
A player whose lead shoulder turns to point behind the ball at the top has achieved a full 90° shoulder turn — the coil that powers the downswing.
Related terms
- Hip TurnHip turn is the rotation of the pelvis around the spine during the golf swing. In the backswing it resists the shoulder coil; in the downswing it leads the kinetic chain to generate speed.
- SeparationSeparation in the golf swing is when body segments rotate at different rates at different times — most importantly when the hips lead the shoulders at the start of the downswing, creating torque.
- BackswingThe backswing is the movement of the club from address to the top position. Its purpose is to create the width, shoulder turn, and wrist hinge needed to generate power on the way down.
- X-FactorThe X-factor is the measured angle between the shoulder and hip turn at the top of the backswing. A large X-factor — typically 40–55° — correlates with higher club speed among tour professionals.
Related guides & benchmarks
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