Did it help?
I think so… this is the first TT I have completed where I was able to sit at or above my LT for almost the entire ride.

My average HR for the race was 162bpm. My last measured LT was 159bpm. I am assuming that an average of 162bpm is my new LT resulting from specific training and not as a result of taking NaPO4.

However, the fact that I consistently had my HR sitting around 168-175bpm makes me wonder if that was the Sodium Phosphate, because although my training has tried to be specific, I have never ridden that high for so long before.

No stomach upsets (apart from being “more” regular) and no other side effects to my knowledge.

I would try this again, but I did a few things wrong in my pre-race week and on the day, so I have to get those things right too (see Racing Report forum).