Transition Sequence

The transition from the top of the backswing to the start of the downswing has a substantial influence on achieving maximum distance from your swing. Kinematic analysis shows the sequence and timing by which major body segments rotate and move through the transition have a major effect on efficient power generation in the downswing.

The optimum sequence order in the transition is pelvis, thorax (upper body), arms, and hands (club). The start of the transition sequence is when the first segment -- the pelvis in an efficient swing -- turns towards the target and the end is defined as when the club moves towards the target. The timing and sequence order between these transitions is a reliable indicator of efficient power transfer.

When the timing of the transition between individual segments is too long or too short, or when the sequence of the segment transitions is not in the optimum order, then some of the potential power that's been built up in the backswing is lost. The order and timing of body segment rotation in the transition is the firing sequence for initiating power production in the downswing.

The movement of body segments through the transition reflects changes in muscle tension. For example when the pelvis moves faster than the thorax in an efficient transition, the spine angle is widening due to stretching or eccentric contraction of core muscles. When the thorax transitions towards the downswing, concentric contraction releases stored energy. We can think of it as a stretch-shorten cycle.

The stretch-shorten muscle cycle in an efficient transition sequence is an extra source of power in the swing. It's been termed "X-factor stretch" by Phil Cheetham who initially quantified this effect in the kinematic sequence.

Optimizing effective power generation begins with our measurement of how your pelvis and thorax moves through the transition using 3D motion capture technology. Identifying what is limiting in your transition sequence provides a basis for corrective drills and exercises to promote an efficient swing.