Sex difference in open-water swimming-The Triple Crown of Open Water Swimming 1875-2017 The aim of the study was to compare the swimming services of successful finishers of the ‘Triple Crown of Open Water Swimming’ from 1875 to 2017 and to evaluate the effects of sex, the venue and nationality of swimmers. Data from 535 Finisher in ‘Catalina Channel Swim’, 1'606 Finisher in ‘English Channel Swim’ and 774 finishers in ‘Manhattan Island Marathon Swim’ were analyzed. We have performed various analyzes and adjustments for regression models for all swimmers and the annual top 5 finishers. The effects (gender, event, time, nationality) and interactions (event time) were examined by a multi-variable spline regression model. For all the swimmers we found that women found about 0.06 km / h faster than men and the Australians were 0.13 km / h faster than Americans where the Americans were 0.19 km / h faster than the British and 0.21 km / h faster than the Canadians. When looking at the annual top 5 swimmer we realized that women were 0.07 km / h slower than men and the Australians were not faster than the Americans, but Americans were 0.21 km / h faster than the British.
Our results improved knowledge about the swimming services in the open waters swim over time at these three events, taking into account the sex and nationality of the swimmers. The whole text can be found under https://pubmed.ncbi.nlm.nih.gov/30157202/