Last year when I was preparing for my first 1/2 Ironman to get comfortable with the mileage I would do a 56 mile bike and 13.1 mile run brick workout (I did this twice). I ended up finishing in 5:21:11 (I know keep my day job). I am now training for a 3/4 Ironman (84 mile bike, 19.6 mile run) ... I'm comfortable with the transition (mechanics and feeling) ... but again want to feel comfortable with that type of mileage. What type of brick workouts should I do (mileage) to feel comfortable? Is this simply a mental hurdle?
