Old-school Tom Coughlin’s fix for injuries? A spa day

Giants coach Tom Coughlin Photo: Charles WenzelbergThe Tom Coughlin Resort and Spa was open for business Thursday, with players able to choose from an array of body-soothing therapies such as massage, yoga and placing their legs in compression boots as they lounged and, if they were so inclined, played video games.

This, mind you, was in lieu of actually getting on the green grass and, you know, practicing football.

“Very surprised,’’ cornerback Prince Amukamara said of the unusual schedule, which came on the final day of Giants training camp. “But I would say injuries may have something to do with it. Injuries have been huge the last couple of years here so I guess we’re all trying to figure…