Mireia managed to overturn Katinka Hosszu’s 400 IM short-course record recently. As shown in the video
Mareia’ great breaststroke term manged to achieve this new world record. But looking at the preceding fly and backstroke legs, if a swimmer would be perfect in all 4 strokes the 400IM world record could still be faster.
Quite often in IM the breaststroke is the deciding leg.
Katinka Hosszu was considerably ahead in the fly and then especially the backstroke and could not even overturn Mareia’s breaststroke lead in the final front crawl leg.
Belmonte set a new 400 IM WR of 4:18.94 at the SC Worldcup in Eindhoven. That eclipses the previous record held by Hungary’s Katinka Hosszu of 4:19.46 set at the 2015 European Short Course Championships.
Usually I think swimmers are either good in the stretchy strokes or the breaststroke but Mareia’s freestyle was equally as good as her breaststroke and so her breaststroke advances could not be overturned by Katinka in the final leg.