Protocols / Squat
strength · sagittal · 12s model
Back Squat
Closed-chain lower-limb kinematics, depth, trunk lean, and eccentric–concentric tempo.
Setup
- Sagittal camera at hip height, 3–4 m from the subject
- Feet approximately hip-to-shoulder width, heels visible
- Bar path or arm position must not occlude hip and knee
Scoring rubric
- Depth: femur at or below horizontal (knee ≥ ~110°)
- Trunk: lean stays consistent; no sudden flexion at the bottom
- Tempo: eccentric 1.5–3.0 s without collapse
- Knee: stays over the foot in the sagittal trace
Literature
Escamilla 2001; Fry, Smith & Schilling 2003 — knee and hip moment trade-off with trunk inclination.
Tracked joints: hip, knee, ankle, trunk. The kinematic engine is a teaching model scaled to the active subject. Export CSV from the report for your own processing.