Why Two Pitchers with the Same Arm Speed Differ by 10 mph — A Motion Capture Analysis

License : Motion capture data from Driveline OpenBiomechanics Project under CC BY-NC-SA 4.0 (non-commercial, share-alike). Citation : Wasserberger KW, Brady AC, Besky DM, Jones BR, Boddy KJ. The OpenBiomechanics Project: The open source initiative for anonymized, elite-level athletic motion capture data. (2022). License: https://creativecommons.org/licenses/by-nc-sa/4.0/ Derivative works (graphs, GIFs) in this article follow the same license. Commercial use by professional sports organization employees is restricted. The Finding Pitchers with nearly identical arm speed (24–26 m/s) can differ by up to 13 mph in pitch velocity. Arm strength alone doesn't explain this gap. So what does? I analyzed 61 pro pitchers using Driveline OpenBiomechanics C3D motion capture data and found 5 body mechanics factors that explain the difference. → GitHub : https://github.com/yasumorishima/baseball-cv The Data Driveline OpenBiomechanics Project (OBP) 61 pitchers, C3D motion capture files 45 markers (sho