For all my lifters:

computer vision app to measure back curvature during deadlift!

main technical highlights:
— RF-DETR (Roboflow) to segment the person (great performance out-the-box with no additional training!)
— YOLO11n (Ultralytics) for bounding box prediction around the barbell weight plate (trained on my own small dataset).
— Mediapipe (Google) for pose landmark detection to guide the bounds for the line fitting.
— Custom logic to fit a line across the back.

about the plots on the right side:

The Back Roundness Map shows the deviation of the estimated back curve from a line of best fit.

Credit: Jeremy Park

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if it matters in AI or Robotics you'll see it here first: 22astronauts.com