Why are there so many older guys in Nascar but no one over 37 in Formula 1?

May be...

ahh... you took the job to do this age survey huh?
ahh.. we see.

Old people race safe cars.

Because by the age of 37, most of them realize how bad F1 sucks.

I think it's just because NASCAR is a more popular sport.

Scott Speed left F1 to race NASCAR

Because they get sick at an early age of the redundancy of
F-1 and Nascar is much less boring.

EDIT-It looks like you answered your own question as Frank A.

Is it because nascar is less physical and doesn't require the same degree of reflexes?

F1 is all about youth, look at Lewis Hamilton he is just 22 and its his 2nd yr..most F1 drivers have retired or fallen off the face of the earth by 37.. David C is retiring at the end of this F1 season. But Nascar is getting younger all the time, I doubt we'll ever see Dale Jr or Smoke driving until they are 51 like Dale Jarrett did.. You can not really even compare Nascar and F1 they are totally different. Kyle Busch says he wants to give F1 a try, well dude you better get over there before you are 25 or 26.. Also T-bone gave some real good comments as well about F1, yep those guys are not big at all, I think the American driver Eddie Cheever was 6'1 thats huge for F1.

Go Dale Jr & Hms

Formula 1 drivers still drive the car and are a major part of winning or losing which requires quick reflex's Nascar the driver just steers a Little to the left with the hope the crew got the set up right. Especially with the COT Nascar drivers are mostly out of the equation for winning or losing

To the original question-asker (can't think of a better word): Yes. You're fairly right.

F1 is much, MUCH more physically, mentally, and financially challenging.
NASCAR drivers don't face too many problems that require a quick reaction time - mostly due to the fact that the cars are pigs and can't get out of their own way as it is.
F1 drivers also face G-forces MUCH greater than NASCAR drivers; so physically, F1 drivers need to be in perfect condition. In NASCAR, if you can fit through the window, you're good.
As far as financially, NASCAR is expensive, but not nearly as much as F1. The entry fees alone for an F1 race are about $26,000 USD per race... just to race one event - that doesn't include the million-dollar cars, team salary, R&D, testing, etc. Here in the US, NASCAR teams are much cheaper to maintain, allowing entrepreneurs and older drivers to get involved.

F1 is superior. It is automotive engineering at its best. NASCAR just happens to be more popular because SPEED Channel and the broadcasting stations jam it down our throats 24/7.

*Note, I say this as a race fan. I am a big Jeff Gordon fan and watch NASCAR weekly, but I just happen to have an "international" taste when it comes to racing.



EDIT:
For an analogy, Formula One is like the NFL. Exciting and fun to watch. To be competitive you have to be young and well-prepared. Past the age of, say, 35, it is all down hill.

NASCAR, on the other hand, is like PGA Tour golf. Sometimes it gets exciting, but only at the end. Otherwise, it is boring as hell. And if you have the means and the desire, you can get into the sport.

Because Formula 1 is boring and older people are lulled to sleep much easier than younger people....zzzzzzz

Because, here in NASCAR we realize the value of age and experience.

In F1, if your looks start to go, your gone.

because a monkey can drive one of them things
it takes a man to drive nascar

OK heres the real answer since Im a fan of both(all). F1 is the most popular racing series in the universe. Its about young, handsome and articulate men that can speak multiple languages. F1 teams will consider the above mentioned over talent at times. In other words they are poster boys for the sport. NASCAR is less centered around those attributes I mentioned. For god sakes you will not see Dale Jr or Mark Martin posing in speedos and spandex out in Monaco or Rio. You're assesment is just plain dumb and you are an F1 reject.

And quite frankly you have to be small and light to race an F1 car.

personally, i think you've got that backwards. watching nascar drivers and how fast their hands have to move over a greater area leads me to believe that their reflexes have to be pretty damn good.

but i will admit that after listening to montoya giving "advice" to rowdy regarding his F1 test later this year, it sounds like the physical preparation needed to handle the g-forces might be enough to "push" older drivers out of formula one (pun intended).
;-)

As you get older you also get well lets say fatter and it's not so easy for a 220 pound man to get in a F1 or Indy car i would think.

37 is the average age that F1 drivers start dying off from sheer boredom. NASCAR is doing it's part to save some by allowing them to join NASCAR .

Nasar is very physical...F1 blows the racing is so spread out its not even funny. talk about a boore
it looks as if you answered your own question anyway so what was the point of this excersize?? you should prob hang out in the F1 forum.

Because NASCAR is an American sport, and Sports stay with a man longer in this country. Especially when it comes to Racing. It means more to "us". This country was based on the automotive industry/revolution, (and it probably suffers from it too). So my answer to your question is: Dedication to the sport.