VALIDITY OF STRIDE LENGTH ESTIMATES OBTAINED FROM OPTOJUMP

  • P. Glazier
  • G. Irwin
Keywords: OptoJump, validity, stride length, three-dimensional videography

Abstract

The purpose of the present study was to ascertain the validity of stride length estimates obtained from OptoJump (Microgate, Bolzano, Italy) using displacement data derived from three-dimensional videography as criterion. One subject repeatedly ran through a 4 m section of OptoJump to obtain real-time stride length estimates. Corresponding criterion stride length estimates were also obtained from the displacement data derived from video. 95% limits of agreement were applied to the 56 pairs of measurements revealing an error interval of 4.2 ± 23.1 mm. We concluded that stride length estimates obtained from OptoJump lacked sufficient validity for use in motor control studies. However, the capability of this system to acquire other relevant data in real-time, provides sufficient scope to suggest pursuing the development of this system.
Section
Coaching and Sports Activities