🎥
Drop a video here or use “Load video” below.
Film from the side, whole body in frame, good light.
Film from the side, whole body in frame, good light.
0:00.00 / 0:00.00
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Throwing arm
Elbow angle
–°
shoulder→elbow→wrist · 180° = arm fully straight
Shoulder angle
–°
hip→shoulder→elbow · how high the upper arm is raised
Wrist speed
–px/s
how fast the throwing hand is moving right now
Release angle
–°
wrist travel direction above horizontal · on the release frame = launch angle
Elbow drift
–% torso
how far the elbow wanders · a fixed hinge stays in single digits
Throw score
–/100
from the last analyzed throw · tap 🎯 Add to comparison to score
Arm:
Display
Tips
Space play/pause · ←/→ frame step.
Use 0.1–0.25× speed or frame stepping to study release. The dotted trail shows the wrist path of the throwing arm — a smooth, repeatable arc is what you want.
Elbow angle is measured shoulder→elbow→wrist. Shoulder angle is hip→shoulder→elbow (how high the upper arm is raised).
Release angle is the wrist's direction of travel (° above horizontal) — step to the frame where the dart leaves your hand and it reads your launch angle.
Throw comparison — stick figures aligned at the release point (0.00 s)
−1.20 s