The between-day repeatability, standard error of measurement and minimal detectable change for discrete kinematic parameters during treadmill running

Kinematic parameters of the trunk, pelvis and lower limbs are frequently associated with both running injuries performance, target clinical interventions. Currently there is limited evidence reporting between-day repeatability discrete kinematic during treadmill running. What repeatability, standard error measurement minimal detectable change running? 16 healthy participants attended two data collection sessions weeks apart. Three-dimensional were collected while ran on a motorised at 3.2 m/s. The interclass correlation coefficient, calculated for initial contact, toe off, peak angles joint excursions stance phase Good to excellent low values observed sagittal frontal plane kinematics contact (Range: ICC, 0.829−0.941; SEM, 0.6°- 2.6°; MDC, 1.5°- 7.2) 0.799 – 0.946; 1.7°- 7.1°). Peak transverse hip (ICC, 0.783; 3.2°; 8.7°) knee 0.739; 3°; 8.4°) demonstrated moderate large SEM MDC values. Kinematics off lowest ICC largest errors all 0.109 0.900; 0.8°- 5.7°; 2.5°- 15.7°). This first study detailing trunk reported may provide useful reference point future studies investigating differences in kinematics.