Conditioning conversions? S/B/R
They really dont compare to each other. There's way too many variables.
Each individual has their strength and weaknesses. Mine is swimming. For me, swimming 2 miles is a harder workout than running 7. My long rides are 50+ miles while my long runs are 10+ miles.
I wouldnt worry about making your sports equal in this manner. Percentage of overall training compared to a:
a) your race distance
b) your weaknesses
A good training plan puts it in perspective.
Life is short. Play hard and get dirty doing it.
When I do what some idea about the comparison, I tend to just use time.
But part of tri training will be to get a new perspective on the workouts, since all are important :) I come from a running background as well and I believe I kept trying to equate it for a while, too. Now I just don't really think of it that way anymore.
No comparison. I prefer to look at what my current performance is in each discipline and compare that to what I want to do in a race. Then I look at how much, and what sort of training will get me there. Naturally my weakness tends to get a bigger slice of work in the early part of training.
Closer to the race I change my focus to what will get me the best race result. If putting in an extra 3 hours/week in the swim will get me 5minutes off my swim time, but 3hours/week on the bike will get me 15min off my bike, then I'll go for the extra time on the bike.
As far as this many kilometres on the bike is equal to this many on the run, well I think it is irrelevant.
See I have a hard time comparing them too...
The way I look at it is in reference to how I place in races. I am a middle of the pack swimmer, a leader in biking and a front peleton in running. If you look at it that way you know what to work on. Then again I dunno if that is what you meant by what you posted :) sorry if I took this thread off track...


I am interested in hearing what the rules of thumb are for conditioning benefits of the 3 disciplines as compared to each other.
I have heard 2.5 to 3 miles on the bike equals 1 mile of running.
How about swim distance to run, or run to bike, etc.
My background is running, and I find I am always trying to put an "effective mileage" value on the biking and swimming I do.
What do folks out there think?
Thanks!