Photojournalists train lenses on sports' wide world

Editor's Note: Watch CNN Newsroom every day during the Olympics for more on these unusual sports in the United States.

(CNN) -- Eyes are on Beijing, China, for the Summer Games, with an estimated 4 billion people expected to tune in to watch the world's top athletes seek the ultimate recognition: an Olympic gold medal.

In light of this international attention to the sporting world, CNN photojournalists from across the country take a look at other kinds of sports.

Sports in Focus: The Other Games considers the different ways that Americans incorporate sports into their daily lives.

Some crave competition, like the Kangaroo Kids precision jump-roping squad that recently got back from the world championships in South Africa. Watch teens combine dance and gymnastics ... while jumping rope »

Others literally need to be fit, like 23-year-old Greg Wagner, who suffered from a brain aneurysm at a young age and has defied his doctor's expectations by sticking to a disciplined exercise regimen.

And many more, like the Darkon live-action players who meet in parks to act out their epic medieval fantasies, or the "Frolf" crowd, who play a hybrid Frisbee-golf game, are simply looking for a way to unwind. Watch Frolfers drive, pitch and putt with Frisbees »

In this series, we also meet volunteer boaters who take kids with special needs out for a day on the Chesapeake Bay, a young man working to prove his talents in the female-dominated sport of synchronized swimming, kayakers training for a grueling race down the Mississippi River and foosball enthusiasts who meet weekly at a neighborhood billiards parlor for intense tournaments. Watch a man break into the "water ballet" world of synchronized swimming »

You'll also see swim team coaches sharing their love of the sport with local kids, underwater rugby players seeking a challenge, and a diverse group of people who insist that skateboarding is more than a sport -- it's also a lifestyle.

For as vast and assorted the sporting world is, one thing is clear: There is no right or wrong way to play, as long as you're having fun. Watch wargamers release their aggression »