although FB is very old, he does have a deep endurance base because he's been at it for years. And doing at least 50 miles a week year round is going to give you a great cycling base.
errm - I may be old but my endurance base in 2005 wasn't that deep - that was my 2nd marathon and my 1st IM year. however I was very focused and had done a huge amount of bike training over the previous autumn.
and in 2010 I blagged it on a lot less training overall (for a number of reasons) but on the back of 5 years of pretty solid training LD training which helped
perhaps the key is not to stick to a rigid plan like Fink?? I've never used a published training plan (bar for my 1st marathon back in 2003 and trying the FIRST plan for my last marathon - which got me injured!!) and have gone on my own plans which have worked for me. my plans have science and madness but can also cope with variables as they are meant to be flexible - as long as I can get the key sessions done, the rest falls around them.
and if you look at the training plans of some of the faster IM around these parts like Mellifera (who won the Outlaw ladies race), and 10' (9:28 at Roth), then you'e be crapping yourselves with fear. they put in huge training loads and their taper weeks are well above what some on here are doing at peak training. Ok, they now have bags of experience behind them but it's still impressive to see that hard graft brings rewards.
I personally don't think there is anything to fear with a spring marathon and a summer IM - just think about what your are doing and apply yourself to the task. and if you don't try, you won't know will you???
Edited: 17/07/2012 at 14:38