Trunk and lower-extremity kinematics differ based on step-down tap variation: An assessment of methodology for a return-to-play protocol using motion analysis

•Standardizing task procedures is crucial for clinical motion analysis protocols.•The anterior step-down tap is recommended for evaluating lower extremity injuries.•The arms and stance foot do not need to be fixed during the step-down tap.•For minimal repetitions, trials may be collected individually or continuously.