Ballparking the Mosley plan I’m following, he basically uses 60/40 bike/run time duration split all the way through the 40 week’r I’m just starting. I’m on the advanced 10/40/5 plan.
I’ve heard of the of the 5:1 bike/run ratio as well but frankly it seems unrealistic if you think about it. You’re going to want to run at least 2 hours a week even for a sprint du, so that would put you at a MINIMUM 12 hours per week following that ratio. That’s a lot of training for a sprint…
I think this How much training volume does it take to maintain ~3w/kg? is good or the spirnt/olympic plans on TR. I would probably throw in a long ride though as suggested in the post at least every other week. Then add in a long run (at least 30-50% longer of your target distance assuming your not doing anything longer than a standard du), an interval session, and a tempo session a week and you’d be good. Find a reassessment you like and do it every 6 weeks or so along with the ramp test.
Just adjust the TSS ramp and periodization to suit your event. Also throw in a brick at least every other week. I’d say over half the weeks on this plan have at least 1 brick workout a week (but they’re generally short 10-20 mins).
For me, the calculators on Mosley’s website to use as zones in TP are a little optimistic for me on the run (based on threshold run pace from a race). I don’t have the run fitness either vs bike. My Zone 2 run pace is predominantly Zone 4 HR. I think I’m going to prioritize HR over pace on the long runs, and pace over HR on any other session. Power > all generally on the bike unless again your Zone 2 is way off consistently.