INDIANAPOLIS (AP) — Longtime IndyCar veterans Helio Castroneves and Tony Kanaan are having too much fun racing to even begin contemplating retirement.

One week after 37-year-old Carl Edwards stunned NASCAR fans by walking away and a little more than a month after reigning Formula One champion Nico Rosberg retired at age 31, the 42-year-old Kanaan and the 41-year-old Castroneves sound as motivated and spry as ever.

"Yesterday I went through the medical and the doctor said I have the health of a 19-year-old kid," Castroneves joked Wednesday during the series' annual media day. "As you heard, age is just a number. I feel as young as ever and I'm ready to go back."

The two popular Brazilian drivers share more than just a devotion for their home nation.

They have similar resumes and thoughts about their future in racing.

While both have nothing left to prove, both are looking to add to already impressive resumes.

Castroneves is a three-time Indianapolis 500 champion and a former winner of "Dancing With The Stars" but is still chasing his first series title.

Kanaan won the 2013 Indianapolis 500, the 2004 series championship, was named IndyCar's most popular driver in 2013 and is embarking on his 20th season in open-wheel racing after having his third child this offseason.

But instead of scaling back the schedule, Kanaan has actually added two non-IndyCar races and hopes to commemorate his 20th season in IndyCar with yet another big feat — winning at Le Mans on one of IndyCar's off weekends.

"It's kind of cool to see that there's not a lot of guys who did that (20 years) and the guys who did it are all big names," Kanaan said. "You get to this point of your career and you start comparing yourself to some of your heroes."

The younger guys aren't surprised that Castroneves and Kanaan are still competing at a high level.

They're more surprised that their younger contemporaries are leaving the sport.

"The Rosberg situation I really can't understand," said Ryan Hunter-Reay, who is 36. "I think he's in one of the best seats in the world. Me personally, I couldn't let that go. Racing's what I love to do. It never gets old."

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