Sprint block start
SetFirst Drive
Front knee
85 to 100° · Bezodis 2015Rear knee
115 to 135° · Slawinski 2010Trunk lean
drive rangeHip extension
drive rangeFive movements
Every sport asks different questions.
Each sport has its own phases, its own checks, and its own published ranges. PRFCT Form picks what to ask, and when to ask it.
Optimal
Optimal
Close
Needs work
Football tackle
ApproachContactDrive & Wrap
Body level
contact range · Hendricks 2015Head position
contact range · Tierney 2018Drive direction
drive rangeBasketball jump shot
Set / LoadRelease
Base alignment
shoulder-width norm.Elbow stack
release range · Okubo 2006Wrist follow-through
release rangePush-up
TopBottom
Elbow angle
rep-depth rangeHip line
trunk-neutral rangeDumbbell curl
ExtendedContracted
Elbow travel
stability rangeTrunk sway
trunk-neutral range+
Your own movement
Pick the joints you care about and the range each one should sit in. Everything else works the same way.
One angle is enough.
Film from the side where you can. No markers, no calibration frame, no second camera. The app handles the rest.
See what your next rep looks like.
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