At 42, Indianapolis Colts kicker Adam Vinatieri is one game away from becoming the fourth kicker in N.F.L. history to convert every single kick over a full season. He has made all 47 extra points and all 28 field goals, including three of at least 50 yards.

He attributes his season of perfection simply to “trying to stay consistent” — the results certainly have been — and taking good care of his body, the oldest in the N.F.L.

“I don’t get under a heavy squat rack or do a lot of heavy power cleaning anymore,” he said in a recent telephone interview. “It’s hard on the joints, and when you get a little bit older, you can do other things that doesn’t take quite as much strain on your body. I do a lot of core stuff to keep my core and hips loose and limber and strong. The workouts have evolved.”

On Sunday, when the Colts take on the Tennessee Titans, Vinatieri can join Gary Anderson (1998, Minnesota), Jeff Wilkins (2000, St. Louis) and Mike Vanderjagt (2003, Indianapolis) as a kicker who did not miss over a full season.