There is also this:
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Most teams come into the facility on Mondays after the game, then give the team Tuesday - Sunday off, then start up in earnest with the following Monday to prepare for the next game.
This gives players the first true 6 day break since the start of training camp.
Players who are undergoing treatment would continue to come in for treatment.
Could the team have practiced on Tuesday and Wednesday? Yes. But they have to give 4 consecutive days off. And you want to do that this week rather than the week of the game.
So there are rules in place.
Apart from giving guys a break not being a bad idea.