Logistical rea-sons prevented the collection of [CK] samples during certain weeks;those weeks were omitted from the analysis.
In addition to individ-ual weekly player measures, average pre-match [CK] was calculatedfor each player based on their respective [CK] samples across theseason. This was done to accurately assess the individual variabil-ity in [CK] across the playing group and to assess relationships withindividual player characteristics.