EAST RUTHERFORD, N.J. — Las Vegas Raiders quarterback Kirk Cousins called the dance Sunday afternoon his “Wellness Celebration,” unsheathing it opposite the New York Jets in a 38-33 victory .

After sneaking his way to a 1-yard touchdown, he stopped his saunter toward the Raiders sideline, bent his knees, flexed his arms and ripped his left elbow back and forth.

Said Cousins postgame, grinning the grin that he hadn’t flashed since Sept. 27: “We do a lot of tissue work here and at my age, it’s especially helpful. … That’s one of the main techniques that they do, so I said someday if I run a touchdown in, I’m going to give a shoutout to all the staff that work so hard to help us feel good and be one of the healthier teams in the league.”

Celebration aside, wouldn’t have known he’s 38 at MetLife Stadium.

Cousins helped the Raiders snap their four-game losing streak, completing 19 of 26 passes for 247 yards and three touchdowns with his scoring run.…