It's hard to explain how these 3 athletes push the limits of what humans are capable of achieving mentally and physically.
1) Dean Karnazes: Ultra Runner: Highlight: Ran 50 marathons in 50 days in 50 different states
2) Annie Thorisdottir: Highlight: 2011 and 2012 CrossFit World Champion
3) Ben Lecomte: Ultra Swimmer: Swam across the Atlanta Ocean. Is schedule to swim from Japan to San Francisco within the next few months.
Feel free to google their names and read about their amazing accomplishments. Equally impressive is their giving spirits to several charities raising thousands of dollars and awareness.
When people say, "I didn't know that was even possible." That's cool.
Enjoy
Video of Dean Karnazes: Holds numerous records in Ultra Running
Video of Annie Thorisdottir: 2011 and 2012 CrossFit World Champion
Video of Ben Lecomte: Swam from Maine, USA to Europe across the Atlantic
