The purpose of the study was to investigate the “Diurnal variation on the performance of coordinative abilities of soccer players”. The study was conducted on 50 male soccer players of Punjabi University Patiala, Punjab India, and age ranging from 17 to 24 years. The subjects were selected from soccer match practice group. The data was collected by administration of Coordinative Ability test as suggested by Peter Hirtz (1985). The subjects were tested two times (one time in morning (between 7 AM to 9 AM) and one time in evening (between 5 PM to 7 PM)). The Coordinative abilities includes Orientation ability, Differentiation Ability, Reaction Ability, Balance Ability and Rhythm Ability which was measured by Numbered Medicine Ball Run Test, Backward Medicine Ball Throw Test, Ball Reaction Exercise Test, Long Nose Balance Test and Sprint at the given Rhythm Test respectively. It was hypothesized that diurnal variation would significantly affect the performance of the subjects on Coordinative abilities. The data collected on Coordinative abilities was analysed by dependent “t” test. The level of significance for testing the hypothesis was set at 0.05 level of confidence. The mean values of Orientation ability in morning and evening were 7.44 seconds and 7.30 seconds respectively. Significant time of day (diurnal variation) effect was found for the Orientation ability (tcal=2.42>ttab=1.99). The mean values of Reaction ability in morning and evening were 166.60 Centimetres and 160.70 Centimetres respectively. Significant time of day (diurnal variation) effect was found for the Reaction Ability (tcal=4.56>ttab=1.99). The mean values of Balance ability in morning and evening were 7.26 seconds and 7.01 seconds respectively. Significant time of day (diurnal variation) effect was found for the Balance Ability (tcal=4.15>ttab=1.99). The mean values of Rhythm ability in morning and evening were 0.51 seconds and 0.44 seconds respectively. Rhythm Ability (tcal=5.50>ttab=1.99) shown significant time of day (diurnal variation) effect among soccer players whereas the mean values of differentiation ability in morning and evening were 15.14 seconds and 14.80 respectively. No significant time of day (diurnal variation) effect was found for differentiation ability (tcal=1.04<ttab=1.99) among soccer players. The result showed that diurnal variation significantly affect the performance of soccer players on Orientation ability, Reaction Ability, Balance Ability and Rhythm Ability whereas differentiation ability showed insignificant diurnal effect among soccer players. Article visualizations
