Amir Khan: How I train during Ramadan
British boxer Amir Khan has been explaining to Newsround how he trains during Ramadan.
It's one of the biggest events in the Muslim calendar when lot of Muslims decide not to eat or drink from sunrise to sunset.
For athletes who are training, that can be a huge deal, as they need food and drink to give them energy.
So how does Amir cope? Sarwat Jaleel spent the day with him to find out.