Reliability of variability and complexity obtained from bilateral stride intervals in recreational runners during a prolonged treadmill run

The stride interval variability and complexity were analysed to gain insights into the development of running-related injuries. Yet, it remains unknown the reliability of the stride interval variability and complexity measured at different days and sides. The present study estimated the between-day and between-side reliabilities of the stride interval variability and complexity during seven recreational runners performing a prolonged treadmill run for three times at their anaerobic speeds. The results showed good between-day reliability and excellent between-side reliability (all intraclass correlation coefficient values > 0.89).