Bike to Run ratio for IM Training?

I’m currently on a solid run focus (6 days a week 40+ building to 50+ miles per week). I’ve gone on a couple rides recently and know that my bike strength has definitely dropped. Last winter I went on a very strong bike focus and it definitely paid off as my 70.3 bike split dropped by 16+ minutes and I had a better run. This year I’m making the jump to IM distance and am starting to add riding back into my training. I plan on keeping the run focus through the end of the year then shift back to a more balanced training load come January. My plan is to keep running 6 days a week (40ish miles) and ride 4 days a week (20, 20, 30 & a long ride). The long ride will be my weekend ride that will build to 100 over 6-8 weeks from 50. As long as I can keep healthy on this training load I will run that through April and then take one of my run days out and add 2-3 swim workouts a week (which is more than I had last year to swim a 33 70.3 swim). The swim isn’t terribly hard for me to build into because I’ve always been around water even though I only swam competitively through middle school in the summers. I know I’m not going to be anywhere near first of out the water, but should have a solid bike and run with the right work.

So is 4-5 hours of running and 8-10 hours of riding an appropriate balance, or do I need to slide the scale one way or the other?

Based on 7mph running and 20mph biking:

Ironman is 4:1 biking to running based on miles

Your suggestion is almost 6:1

That being said I live in a cold climate to during the short biking season I go up to 10:1 during the summer but 1 1/2:1 during the winter.

My goals for IM were 20x the distance for the previous year 190Km swimming, 5,600 miles biking, and 1,310 miles running. I always made the running, and often made the swimming, but biking 5,600 miles was definitely a stretch goal.

My monthly targets are somewhere around 160 miles running, 550 bike, ~20mi swim with a little more or less depending on if I’m doign a particular focus. Running could go up to 200, and biking up to about 700. Probably won;t swim much more except a couple times in winter during hte crappiest weather… I’ll probably do a swim focus.

My average during 4 months leading up to IM are around 5.5 hours per week run, around 8 hours per week bike, around 2 hours per week swim.

That doesn’t tell you much though because I will have plenty of hard bike weeks up over 11 hours, plenty of long run weeks up over 60 miles, and I don’t really introduce swimming until a month into build, for there I am usually 3 hard hours per week.

2 IMs, 10:2x, 9:5x. Planning on a sub 9:30 in near future.

Wow. Avg 40 miles running per week? Peak 50?
When is you next Ironman?

My monthly targets are somewhere around 160 miles running, 550 bike, ~20mi swim with a little more or less depending on if I’m doign a particular focus. Running could go up to 200, and biking up to about 700. Probably won;t swim much more except a couple times in winter during hte crappiest weather… I’ll probably
do a swim focus.

When is your Ironman?

I’m currently on a solid run focus (6 days a week 40+ building to 50+ miles per week). I’ve gone on a couple rides recently and know that my bike strength has definitely dropped. Last winter I went on a very strong bike focus and it definitely paid off as my 70.3 bike split dropped by 16+ minutes and I had a better run. This year I’m making the jump to IM distance and am starting to add riding back into my training. I plan on keeping the run focus through the end of the year then shift back to a more balanced training load come January. My plan is to keep running 6 days a week (40ish miles) and ride 4 days a week (20, 20, 30 & a long ride). The long ride will be my weekend ride that will build to 100 over 6-8 weeks from 50. As long as I can keep healthy on this training load I will run that through April and then take one of my run days out and add 2-3 swim workouts a week (which is more than I had last year to swim a 33 70.3 swim). The swim isn’t terribly hard for me to build into because I’ve always been around water even though I only swam competitively through middle school in the summers. I know I’m not going to be anywhere near first of out the water, but should have a solid bike and run with the right work.

So is 4-5 hours of running and 8-10 hours of riding an appropriate balance, or do I need to slide the scale one way or the other?

End of July. Whistler…

5-6 hours a week of running and 8-10 hours per week of riding sounds like a better balance. Add in 3-4 hours of swimming per week and you’re at 16-20 hours total per week.

I actually have run about 5 hours a week for quite a while, while swim/bike volume goes up and down.

Google Jesse Kropelnicki, critical volume subject. You will likely get answers you are looking for from a coach that has many athletes to draw on. Critical volume was something he wrote sometimes back, he also covers bike to run training ratios. He has a good rationale behind it. You can also google qt2 systems, look for his blog.
I would rather point you to something like this than, I do this…because you have no idea where I am coming from, what my weaknesses are and why I do things in a certain manner. Just because I do it, it does not mean it is correct or you should do it.
You will have most of your questions answered from that blog.

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If you break it down in terms of time you should be somewhere around 50 / 30 / 20 for bike, run, swim. You need to consider intensities though because they are not all easy or hard miles.

Train smart.