No association of skin-fold thicknesses and training with race performance in male ultra-endurance runners in a 24-hour run For elitic runners from 100 m to the marathon, depending on the route and the sex, there is a connection between certain skin fold thicknesses and the competition time.We examined for 24-hour runners whether there is a connection between skin fold thicknesses and mileage. We found neither a connection between skin fold thickness and competition performance nor between skin fold thickness and training circumference, found under https://www.jhse.ua.es/article/view/2011-v6-n1-no-association-of-skin-fold-thicknesses-and-training-with-race-performance-in-male-ultra-endurance-runners-in-a-24-hour-run