Simone Biles, Ryan Lochte and more Olympic hopefuls tell us why they're 'strong'

The world's greatest athletes don't get to the top by pure luck.

Some are helped along by their faith, while others get support from family or draw strength from past struggles.

In chats with TODAY, several athletes who will be representing the U.S. at the 2016 Olympic and Paralympic games shared the things they believe have kept them "strong" on the road to Rio.