With jingles being sung around the world, "Santa Claus is coming to town," scientists and experts find it to be a miracle as to how old St. Nick can do it. Even if it's just a one-time event, what he does every year is quite a feat. So with everything happening during Christmas, is Santa Claus really ok?

It can take days for Santa to check the list of kids who have been naughty and nice, twice even as the song goes, add the fact that he has to make all those deliveries around the world. And in doing so, Santa Claus sacrifices sleep.

But considering that he only does it once a year, it may not be too bad for his long-term health, said sleep experts Professor Franco Cappuccio and Dr. Michelle Miller, from the University of Warwick's Warwick Medical School.

When it comes to short-term risks for not sleeping however, he could experience drowsiness as he drives his sleigh, as well reduce his ability to think and remember.

The sleep experts recommend Santa to take a nap on a rooftop now and again for no more than 20 minutes, but still, this does not substitute a good eight hours of a night's sleep.

Another concern of the experts is that Santa will feel jet-lag at the end of his trip as he will be flying over different time zones around the world while trying to deliver presents at exactly mid-night.

For this, Cappuccio and Miller recommends Santa to get some catch-up sleep, however, long-term consequences of sleep deprivation can be serious. Thankfully, St. Nick only does this once every year.

For those who may be worried that Santa maybe under a lot of stress during this crucial time, do not worry, because according to Dr. Rachel Vreeman of the Indiana University School, people like Santa Claus who feel a sense of purpose at work tend to be healthier, MSNBC.com reported.

The doctor explained that even though St. Nick is working very hard, the other characteristics of his job protects his health.

Dr. Vreeman's only concern about the jolly man in red is his body mass index and how he falls into the obese category. But because he is immortal, Santa doesn't have to worry about risks like heart diseases or diabetes.

All in all, with the review of different experts and doctors, dear ol' Santa Claus will be coming to town on Christmas to spread joy and happiness to children and adults alike.