Validity and reliability - Single beam photocell - Appendix B - Individual sprint times

Appendix B. Individual sprint times for each participant across trials. Pre-professional soccer players performed test and retest trials of 20 m linear sprints, with five minutes of passive recovery. The first half (10 m) and the full sprint (20 m) had their time simultaneously measured by a three single-beam photocell system (100 Hz) and a high speed one panning camcorder reference method (240 fps).