Lance Armstrong Says Children Need Exercise

Lance Armstrong says his three children don't waste their time playing video games: He makes sure they get out and get physical.

"It's all about lifestyle," the seven-time Tour de France champion said Thursday at the Clinton Global Initiative. "It's what you do when you wake up to when you go to bed."

Armstrong, who has retired from cycling, has a son and twin daughters, all under the age of 10.

The 35-year-old cancer survivor warned of an "epidemic" of poor health if the future of the developing world came with plenty of couch conveniences.

He made the comments in a session on combating chronic diseases at the annual conference that brings together world leaders, business moguls, celebrities and other activists to brainstorm solutions to global problems.

Armstrong, who survived testicular cancer that spread to other parts of his body, including his brain, also emphasized the importance of anti-smoking efforts around the world.

He is now training for his first New York City Marathon on Nov. 5.