OpenCap Weightlifting Analyzer (Starter)

OpenCap Weightlifting Analyzer (Starter Template)

Upload OpenCap CSV → map columns → see charts + coaching metrics for Snatch, Clean, and Jerk. Works fully in-browser (HTML/CSS/JS).

1) Upload

OpenCap CSV file

Tip: If your CSV includes left/right joint columns, this template can compute symmetry and pick a side or average.

2) Lift & Column Mapping

Lift

Time column (seconds OR normalized %)

If you only have frames, use frame index as “time”.

Knee flexion (Right)

Knee flexion (Left)

Hip flexion (Right)

Hip flexion (Left)

Ankle dorsiflexion (Right)

Ankle dorsiflexion (Left)

Shoulder flexion (Right) (optional)

Shoulder flexion (Left) (optional)

Elbow flexion (Right) (optional)

Elbow flexion (Left) (optional)

3) Options

Use side

Smoothing (moving avg)

Phase detection is “rule-based” (starter). It’s good enough to begin coaching insights, and Tim can upgrade it to ML/physics-informed segmentation later.

Outputs

Status: Waiting for CSV… Detected phases: —

Triple Extension Speed (proxy)

—

Avg |d(hip+knee+ankle)/dt| during power phase

Catch Depth (proxy)

—

Max knee flexion near catch window

Left–Right Symmetry (knee)

—

Mean absolute difference across rep

Jerk Dip–Drive (if Jerk)

—

Dip depth + drive speed proxy

Upload a CSV, map columns, and click Analyze + Plot.

Metrics Table

This table is meant to be saved per rep. In the starter, it analyzes the single CSV file you loaded.

Lift	Power Phase (start→end)	TES proxy	Catch depth (knee °)	Dip depth (knee °)	Drive speed proxy	Symmetry (knee °)	Notes