Is the reliability of 3D kinematics of young obese participants dependent on the hip joint center localization method used?

•The reliability of hip and knee kinematics for a young obese population is reported.•The predictive and functional method are equally reliable for kinematic analysis.•Data indicate higher errors for the trans. plane (<4°) compared to the others (<3°).•Data indicate great inconsistencies in HJC localization between both methods.