Aim: To investigate the impact of intermittent Ramadan fasting on the ability of children to perform repeated sprints. Methods and results: Eighteen children performed 6 × 15. m sprints (15. s rest) before, during (1st and 4th week) and after (2 and 4 weeks) Ramadan. Compared to baseline, total sprint times lengthened 4 weeks into Ramadan and remained elevated 2 weeks post-Ramadan. Initial sprint performance and sprint decrement score did not change. Conclusions: Repeated sprinting performance was compromised towards the end of the Ramadan month in children and this effect persisted for 2 weeks, while fatigue resistance was not affected.