We can now openly watch the full documentary of the feat that was done in Germany when Kristian Blummenfelt y Kat matthews they won the U7U8 challenge.
In the event, held at the DEKRA Lausitzring stadium in northeastern Germany, triathletes Kristian Blummenfelt, Joe Skipper, Nicola Spirig and Mat Matthew achieved lower than 7 and 8 hours in the Ironman distance.
The victory went to Kristian Blummenfelt with 6:44:25 and Kat Matthews with 7:31:54
Check the results and comparisons of the Sub7Sub8
This is the complete documentary where you can see how this challenge was.