Powerlifting and weightlifting were considered to be a single sport.

And more teenagers now choose to specialize in a single sport.

"I don't think there is anyone who could name a single sport that was covered any differently because of this deal."

Each term at the college has a single primary sport:

As of 2004, it is Sweden's largest single sports organization.

"It reduces the risk of injury of doing one single sport."

Football was the single popular sport in Afghanistan before the introduction of cricket.

In many parts of the countryside, facilities are often too remote for young people and focus on a single sport.

All of these scenarios show what can happen when you think fitness means mastering a single sport or activity.

Williams has been quoted as saying she's played "every single sport on the face of the planet."