Research receipts
The angle. The corridor. The paper.
Every check names the number it measured, the corridor it compared against, and the published study behind that corridor. Nothing is scored against a number we invented.
| Check | Phase | Corridor | Cited paper | Status |
|---|---|---|---|---|
| Sprint · front knee | Set | 85–100° | Bezodis et al. 2015 | Admitted |
| Sprint · rear knee | Set | 115–135° | Slawinski et al. 2010 | Admitted |
| Sprint · front hip | Set | 40–60° | Bezodis et al. 2019 | Admitted |
| Sprint · trunk lean | Drive | sport-specific | Slawinski et al. 2010 | Pending |
| Sprint · trunk angle | Set | 15–40° | Harland & Steele 1997 | Pending |
| Basketball · release | Release | phase-specific | Okubo & Hubbard 2006 | Admitted |
| Football · contact body level | Contact | contact corridor | Hendricks et al. 2015 | Admitted |
| Football · head position | Contact | contact corridor | Tierney et al. 2018 | Admitted |
| Football · drive direction | Drive & Wrap | drive corridor | Tierney et al. 2018 | Pending |
Why a corridor, not a number.
Bodies differ. A published range is a corridor an athlete should fall inside, not a single figure to hit. PRFCT Form reports where you landed within it, and flags the checks that fell outside.
Admitted
Inside the published corridor for that phase.
Pending
Near the edge, or measured on a frame with lower confidence.
Objected
Outside the corridor. The number and the gap are both shown.
Put the next rep into evidence.
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