ASSESSING THE ACCURACY OF INVERSE KINEMATICS IN OPENSIM TO ESTIMATE ELBOW FLEXION-EXTENSION DURING CRICKET BOWLING: MAINTAINING THE RIGID LINKED ASSUMPTION

  • Denny Wells
  • Jacqueline Alderson
  • Kane Middleton
  • Cyril Donnelly
Keywords: upper body, kinematics, cricket, legality

Abstract

The aim of this study was to determine how maintaining the rigid-linked assumption and employing inverse kinematics within OpenSim (OpenSim-IK) influences a model’s estimates of elbow flexion-extension (FE) during cricket bowling. To test this 1) estimates of elbow FE angles were calculated by OpenSim-IK and traditional models using markers attached to a mechanical linkage arm (both static and low velocity range of movement). 2) The same models were used to estimate elbow FE during cricket bowling. Under both static and low velocity dynamic conditions both models produced highly correlated elbow FE estimates (r2= 0.96 to 1.00). When comparing total elbow extension range between models, significant differences were not observed (p=0.87 to 0.96) indicating that both models produce similar recommendations for bowler legality.