And on the first day … Russell Wilson was energized.

And, more importantly, he is already off and running, as far as injecting that energy coursing through his veins into another new set of teammates.

It remains to be seen how much he has left in his physical tank and if he can reverse the downward trend his NFL career has taken, but there is no denying that Wilson’s personality is a force unto itself and that the Giants will see, hear and feel the difference now that he is their starting quarterback.

“From the very first interaction with him, you could tell the guy knows a lot of ball, and the biggest takeaway for me was just his passion,’’ second-year tight end Theo Johnson said Monday, as players arrived at the team facility for the start of the offseason workout program. “He loves football and every aspect of the game, which is infectious and something that he’s going to infect in our locker room just his love and his passion for the game.’’