Horses for courses and common sense really; can't sanction for idiocy.
In our house, religious observence comes before anything else. If that means DS has to miss sporting events, then so be it. Also there is an age after which fasting is compulsory for all Muslim adults who are healthy.
Not fasting because of sport duties is not allowed.
On that basis then, how would you advise we guide unaccompanied teenagers, who are already at events and pushing themselves really hard amongst non fasting peers?
This is the first year I have been helping out with kids that are maybe post puberty, also in fairness probably the first year they have not been able to drink water, so are unaware of their own bodies and yesterday the child obviously pushed too hard.