Full Swing – Radial / Ulnar Deviation

Full swing / pitching data

Radial(+) / Ulnar (-) Deviation

Hinged(+) / Unhinged(-)

Cocked(+) / Uncocked(-)


Unhinged wrist at address, -30 deg. ulnar


Added 25 deg. of wrist hinge
(30deg - 5deg = 25)


Returned to same amount of ulnar as address, -30

Radial/ulnar deviation measures how much wrists are hinged during the swing.

This depends on individual wrist anatomy and range of motion. Also the calibration step is important, if player’s wrist is ulnar deviated during calibration step this will also influence the rest of the data.

Good way to analyze ulnar/radial is to see how much the wrist hinge changes from address to top. This allows to compare player’s who have different wrists and different address value.

Usually players have around 20-30 degree change from address to top. For players with a lot of wrist hinge it can even be 40-50 degree change from address to top. Usually more radial deviation is coupled with more extension.

At impact wrist ulnar deviation is usually close to its address value.