Beijing's slopes are still "hot" after the results with which Usain Bolt astonished the whole world in 2008: the world 100 metres record in only 9"69 and the 200 meters record in 19"30. Only a year later, in Berlin, Bolt managed to improve both results by 11 hundredths of a second, stopping the clock at 19"19 in the 200 metres final and at 9"58 in the 100 metres final.

It was precisely the extraordinary results achieved by the Jamaican that spurred many scholars to try figuring out how many possible improvements we will see from now on, including in the next Olympic Games.