What the kinematic sequence actually means

Four peaks, one after the other

415 / 552 deg per secondPeak pelvis / thorax rotation in the downswing, 11 PGA pros

In the downswing four things speed up and then slow down in turn: the pelvis, the thorax (the ribcage and everything attached to it), the lead arm, and the club. Each one reaches its top speed later than the one before it, and faster. That pattern is the kinematic sequence.

In a study of 11 PGA professionals, peak pelvis rotation during the downswing averaged 415 degrees per second and peak thorax rotation 552. Tinmark and colleagues found the same rising order across 47 skilled golfers, in full and partial swings. The part most golfers miss is the slowing down. Each peaks and then decelerates before the ball arrives. The club peaks last, at or very near impact.

The order beats any single number

60%Tour players showing the full pelvis, thorax, arm, club order

Phil Cheetham, who built much of the 3D biomechanics behind this idea, gave these numbers in a GolfWell interview: 89% of tour players turn the pelvis first in transition, 74% go pelvis then ribcage, and 60% show the full pelvis, thorax, arm, club order. No sample size is given. Four in ten tour pros do not produce the textbook graph and still make a living at it.

A 2026 study of 14 elite right-handed male golfers from the PGA Tour, Korn Ferry Tour, NCAA and PGA of America found slight variations in sequencing gave comparable clubhead speed. Its conclusion also calls keeping the pelvis, torso, arm and club in order during the downswing critical for optimizing speed.

Neal and colleagues put the hardest check on it: timing elite golfers' own well-timed and mistimed shots, they found no significant difference in segment timing between the two.

What out of order feels like

0.20 to 0.33 secDownswing length, Tour Tempo's five full-swing settings at 30fps

Tour Tempo's five published full-swing settings, counted in frames of 30fps video, put the downswing at 0.20 to 0.33 seconds. All four peaks happen inside that.

The common amateur version is the arm peaking with the trunk or before it. The feel is specific: the hardest effort happens right at the top, and there is nothing left at the ball. It feels rushed early and heavy through impact, and distance stays flat however hard you swing.

The 11-professional paper quotes earlier work by Cheetham and colleagues rather than measuring this: amateurs use their arms earlier in the downswing than pros, and vary more from swing to swing. From down the line the arms-first version usually shows up as the over-the-top move, which the over-the-top guide covers.

What a phone can and cannot see

3 msGap from upper torso peak to arm peak, elite golfers

No single phone camera measures pelvis rotation in degrees per second, and the gaps here are smaller than a frame. Neal and colleagues timed 3 milliseconds between the upper torso peak and the arm peak; one frame at 30fps lasts 33. Reading a full sequence graph honestly takes 3D capture in a fitting bay.

Video still gives you timing. Pebble Swing runs pose tracking in the browser and reports the backswing to downswing tempo ratio from the motion, not segment peak speeds.