From clothing to physical anatomy, here are five major factors that affect the performance of your favorite Olympic athletes. Click on each to find out how they affect athletic performance:
1. The Anatomy of an Athlete
2. The Heart of a Contender
3. The Garb of a Champion
4. The Eye of the Tiger: Focus and Drive
5. The Illegal Edge of Doping

For more, check out these related articles:
How the First Olympics Worked
Are the Olympics ever skipped?
How Olympic Torches Work
What is China doing to create a green Olympics?
Have thousands of children in China been named Olympics?
What are Olympic medals made of?
Olympic Mascot Slideshow: From Cute to Crazy
Decoding Summer Olympic Jargon