Fig 1One delivery, measuredHover to scrub · space to playfront-foot contact · knee 166°
The 33 points Stance tracks, drawn as Stance draws themA camera locked on the joints it is measuringPhone rigs side-on and front-on, ring lights, two floodlightsA right-arm quick over the wicket, filmed by a phone square to the crease on the far side and one down the pitch. The run-up plays at speed and the stride plays 5× slower, the way a phone's slow motion would. At front-foot contact the front knee reads 166° and gives 0° in the next quarter-second (braced; Stance flags more than 8°). Between back-foot and front-foot contact the shoulders trail the hips by up to 42°, and the trunk leans 31° forward at contact. These are the values Stance reported for one real delivery; the skeleton is posed to match them. Stance estimates separation from a 2D front-on view, so treat that one as a relative indicator rather than a true rotation angle.
Stance Cricket™Stance Lab · Bowling