I did a 70.3 earlier in the year and also raced about 8 ITTs and TTTs in the 6 months building up to it. They complement each other pretty well in my experience. In the weeks where you do a TT just use the race to replace an appropriate workout, ideally a threshold one. I also find I can still crank out a decent TT/threshold effort while carrying quite a bit of fatigue in my legs, and that those efforts don’t take as much recovery as a road race with a lot of VO2 and anaerobic work.
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