Predictor Variables for 100 Km Race Time in Female Ultra-Marathoners We examined in female 100 km runners, which correlate variables of training, physique and experience with the conclusion time. With the results we were able to create a formula to estimate the 100km final time, read below https://www.researchgate.net/publication/49834655_predictor_variables_for_100_km_race_time_in_female_ultra-marathoners