Then he should NOT work in (on) a field that requires a high level of physical performance during a time that coincides with a self imposed, physical commitment to his ‘faith.’
Period.
And the Vikings are in a lovely position to be sued. If he faints and is given fluids THEY violated his religious freedoms; if he dies of dehydration his estate will no doubt sue for the damages caused by their (Vikes) failure to provide for Mr. Religious Conviction’s safety.
Their nutritionists should do a batter job getting him through the month. Part of their job is to work with the particular variations of all their people, food allergies and religion, to give them the fuel they need. It’s just a sunrise to sunset restriction, a good chunk of the NBA has managed to handle this with a much more frequent game schedule without incident for ages. If they really really couldn’t figure out how to handle it that’s what the 53rd roster spot is for.
And of course Ramadan is over before his season starts anyway.