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Olympic facts: 10 things you didn't know about the 100m sprint | Olympics 2012: athletics | The Guardian
![Olympic facts: 10 things you didn't know about the 100m sprint | Olympics 2012: athletics | The Guardian Olympic facts: 10 things you didn't know about the 100m sprint | Olympics 2012: athletics | The Guardian](https://i.guim.co.uk/img/static/sys-images/Sport/Pix/columnists/2012/8/6/1344236039463/Usain-Bolt-001.jpg?width=220&quality=85&dpr=1&s=none)
Olympic facts: 10 things you didn't know about the 100m sprint | Olympics 2012: athletics | The Guardian
![Olympic facts: 10 things you didn't know about the 100m sprint | Olympics 2012: athletics | The Guardian Olympic facts: 10 things you didn't know about the 100m sprint | Olympics 2012: athletics | The Guardian](https://i.guim.co.uk/img/static/sys-images/Sport/Pix/pictures/2012/8/5/1344200086374/Usain-Bolt-Jamaica-008.jpg?width=220&quality=85&dpr=1&s=none)
Olympic facts: 10 things you didn't know about the 100m sprint | Olympics 2012: athletics | The Guardian
![Olympic facts: 10 things you didn't know about the 100m sprint | Olympics 2012: athletics | The Guardian Olympic facts: 10 things you didn't know about the 100m sprint | Olympics 2012: athletics | The Guardian](https://i.guim.co.uk/img/static/sys-images/Sport/Pix/pictures/2012/8/5/1344193862279/Usain-Bolt-and-Dwain-Cham-008.jpg?width=220&quality=85&dpr=1&s=none)
Olympic facts: 10 things you didn't know about the 100m sprint | Olympics 2012: athletics | The Guardian
![Olympic facts: 10 things you didn't know about the 100m sprint | Olympics 2012: athletics | The Guardian Olympic facts: 10 things you didn't know about the 100m sprint | Olympics 2012: athletics | The Guardian](https://i.guim.co.uk/img/static/sys-images/Guardian/Pix/pictures/2012/8/11/1344725666937/-460.jpeg?width=220&quality=85&dpr=1&s=none)
Olympic facts: 10 things you didn't know about the 100m sprint | Olympics 2012: athletics | The Guardian
![Olympic facts: 10 things you didn't know about the 100m sprint | Olympics 2012: athletics | The Guardian Olympic facts: 10 things you didn't know about the 100m sprint | Olympics 2012: athletics | The Guardian](https://i.guim.co.uk/img/static/sys-images/Sport/Pix/pictures/2012/8/5/1344201364223/Usain-Bolt-006.jpg?width=220&quality=85&dpr=1&s=none)