These performances are limited by physiology, but also by anti-doping efforts and restrictions on technological innovations (shoes, swimsuits, etc.). The graphs show the world's ten best annual performances from 1890 to 2014 in the men's 100 m and shot put. They reveal the impact of both world wars, as well as the effect of anti-doping controls. They also show that performances in the 100 m, like those in the marathon, are still improving slightly.