Not a Muslim, but my understanding is that it's a sun-up to sun-down fast. There's typically communal meals to break the fast. I think strictly observed there

Not a Muslim, but my understanding is that it's a sun-up to sun-down fast. There's typically communal meals to break the fast. I think strictly observed there's also no water during the fast, which would seem to be a real challenge to an athlete, both during the event and for recovery.