Figure 4From: Participation and performance trends in multistage ultramarathons—the ‘Marathon des Sables’ 2003–2012Change in running speed in the annual top three athletes per nation during the 2003–2012 time period for women (A) and men (B). FRA France, GBR Great Britain, ESP Spain, ITA Italy, MAR Morocco. In case of a significant change in running speed over time, r2 and as p value are inserted.Back to article page