It also depends if you do nothing in between the end of 1 IM and the start of the next training block.
For year 2 I reverted to a 'normal' week, bike / run commuting, then picked up from where I was 30 weeks out... You carry lots of fitness and endurance from one year to another, - I was straight back into 3 hour + rides
Now I am doing a repeatable basic week for 45 weeks a year - ie you pick up from where you were, and maintain / build fitness through the year, but with the last 10 weeks really building up. ie its all about consistency week in week out building year round fitness.
Oh if you repeat what you did last year you won't get the same results.... You are fitter / have more endurance so you will end up going faster / recovering better / without even noticing it......
Edited: 28/08/2012 at 21:49