SEX DIFFERENCE IN OPEN-WATER ULTRA-SWIM PERFORMANCE IN THE LONGEST FRESHWATER LAKE SWIM IN EUROPE Certain studies are of the opinion that they are approaching women more and more of men’s performance, especially for stress forms such as swimming where specific aspects such as body fat can influence performance. We have analyzed the competition readings of the ‘Zürichsee swim’ from Rapperswil to Zurich over 26.4 km from 1987 to 2011.Generally, both the finishers like the winners were getting older during swimming times were not faster. For the winners, the men with 403 ± 43 min were more and more faster than women at 452 ± 63 min during the time of all finishers between men (530 ± 39 min) and women (567 ± 71 min) was not different.The performance difference of ~11.5% between men and women remained unchanged over the 25 years of competition.
It is unlikely that women will reach the performance of men in a floating route of around 25 km. All details below https://pubmed.ncbi.nlm.nih.gov/22744414/