A comparison of ultra-endurance cyclists in a qualifying ultra-cycling race for Paris-Brest-Paris and Race Across America - Swiss cycling marathon. We have ultra-wheelers who want to qualify for ‘Paris-Brest-Paris’ with ultra-cyclists who want to qualify for the ‘Race Across America’ compared to training and physique. It turned out that the cyclists in preparation evoked the training very specifically on the race. The study can be found under https://pubmed.ncbi.nlm.nih.gov/22582679/