Every distance event more than 4 hours I have a really hard time breathing. Like to the point where I can only go for like a quarter mile without stopping to walk and even at like a 10 minute pace. It had been consistent at mile 8 of either an Ironman or 70.3. Any insight?
To make it a little easier Iāll give some background. I have a 253 marathon to my time and have not ever had this issue with marathons. My ftp is 330 and kept my Ironman bikes around 235 (which I feel is pretty conservative so I can run well) nutrition wise Iāve taken in around 300-400 calories an hour on the bike (played with it over the last few Ironman) . Just did Santa Rosa yesterday and was 8th overall coming off the bike and until about mile 6 and then the breathing thing came up and had to proceed to a run/walk as I couldnāt go more than 1/4 mile without having trouble breathing.
Has anyone else experienced this??