I used the intermediate FInk program for Outlaw last year with the following basic adaptions:
- I may not be a fast swimmer but I'm quite happy with it so I ignored all the swim sets and went to myclub session on a Thursday night as my only swim a week up until the beginning of April when I added in an OW swim on a Saturday morning (these were my longer swims rather than the club set).
- I dropped the Friday run and replaced it with a spin class as I'm a runner so wanted to work more on the bike. Towards the last 4-6 weeks I stopped going to this.
- I did a two 100 mile bike rides but otherwise stuck to the suggested times so my 5:30 rides had me doing around 80M, which are the bread and butter of ironman training
Although having the long bike on saturday means you have tired legs for your run on sunday, this gives you an idea of what it's like to do long runs tired so I think it's the best way to do it - you are looking for time on your feet on the run, not distance.
This year for Henley, I marathon trained up to the end of May with a spin class and medium length ride, three runs and a swim per week. After the marathon I changed to a combination of 'just finish' fink plan (for the weekdays, but again ignoring the swim sets) and intermediate fink plan for the weekend sessions and raced a PB by just under 45 minutes.