BECOMING BATMAN: Is it possible?
Warner Bros.

Batman is the most down-to-earth of all the superheroes. He has no special powers from being born on a distant world or bitten by a radioactive spider. All that protects him from the Joker and other Gotham City villains are his wits and a physique shaped by years of training—combined with the vast fortune to reach his maximum potential and augment himself with Batmobiles, Batcables and other Bat-goodies, of course. In the 2005 blockbuster Batman Begins, vengeful Bruce Wayne (played by Christian Bale) hones his killer instincts in the streets for seven years before landing himself in a Bhutanese prison, where he falls in with the mysterious League of Shadows, who teach him the way of the ninja. The Dark Knight, the next movie in the Batman franchise, opens in theaters Friday. To investigate whether someone like Bruce Wayne could physically transform himself into a one-man wrecking crew, ScientificAmerican.com turned to E. Paul Zehr, associate professor of kinesiology and neuroscience at the University of Victoria in British Columbia and a 26-year practitioner of Chito-Ryu karate-do. Zehr's book, Becoming Batman: The Possibility of a Superhero (The Johns Hopkins University Press), due out in October, tackles our very question. An edited transcript of the conversation follows.

What have comic books and movies told us about Batman's physical abilities?
There's a quote from Neal Adams, the great Batman illustrator, who said Batman would win, place or show in every event in the Olympics. Probably if I were Batman's handler, I'd put him in the decathlon. Although Batman is shown in the comics as being the fastest and the strongest and all these other things, in reality you can't actually be all of that at once. To be Batman properly, what you really need to do is be exceptionally good at many different things. It's when you take all the pieces and put them together that you get the Batman.

What's most plausible about portrayals of Batman's skills?
You could train somebody to be a tremendous athlete  and to have a significant martial arts background, and also to use some of the gear that he has, which requires a lot of physical prowess. Most of what you see there is feasible to the extent that somebody could be trained to that extreme. We're seeing that kind of thing in less than a month in the Olympics.

What's less realistic?
A great example is in the movies where Batman is fighting multiple opponents and all of a sudden he's taking on 10 people. If you just estimate how fast somebody could punch and kick, and how many times you could hit one person in a second, you wind up with numbers like five or six. This doesn't mean you could fight four or five people. But it's also hard for four or five people to simultaneously attack somebody, because they get in each other's way. More realistic is a couple of attackers.

How long would Bruce Wayne have to train to become Batman?
In some of the timelines you see in the comics, the backstory is he goes away for five years—some it's three to five years, or eight years, or 12 years. In terms of the physical changes (strength and conditioning), that's happening fairly quickly. We're talking three to five years. In terms of the physical skills to be able to defend himself against all these opponents all the time, I would benchmark that at 10 to 12 years. Probably the most reality-based representation of Batman and his training was in Batman Begins.