Oliver R. SO hardcore. You are the first. FYI: The legend is that Mark Zuckerberg, Facebook CEO, does 5,000 pushups in a week. Or at least did once. Here's the story:

"Despite the signs of Zuckerberg’s personal development, insiders say he has always displayed qualities that make him a leader. He is relentlessly competitive. Last month, he and other engineers challenged each other to do 5,000 pushups in a week. Zuckerberg vowed he could do it, but others doubted him, placing 30-to-1 odds against it, recalls Sandberg. Zuckerberg insisted the goal was easily attainable. He took regular breaks throughout the day to do 10-15 pushups, even if he was in the middle of a meeting with visitors. He completed the 5,000...."

See: http://venturebeat.com/2009/10/02/mark-zuckerberg-the-evolution-of-a-remarkable-ceo/ 2 years ago