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James Dasaolu of Great Britain (lane 6) and Usain Bolt of Jamaica (lane 7) starts in the Men's 400m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on August 4, 2012
James Dasaolu of Great Britain (lane 6) and Usain Bolt of Jamaica (lane 7) starts in the Men's 400m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on August 4, 2012

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    The tech behind the track at the games

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The tech behind the track at the games

An expert explains the science behind the surface that may be helping Olympians run better times.

The tech behind the track at the games

An expert explains the science behind the surface that may be helping Olympians run better times.