I'm always concerned for muslim athletes this time of year. They don't give up their training or anything, and they don't drink any water during the day.
In college, we had quite a few exchange students from the middle east in the engineering school. We had a 6-9pm evening class one fall quarter, and at 7pm on the dot one night, one of the muslim guys announced "I'm ordering pizza for everyone!!!!!" The professor was muslim too, so we ended up having our own little iftar right there in the classroom with pizzas and breadsticks galore. From then until the end of Ramadan, about 3 weeks later, we all brought in snacks to share for after 7pm.