I can't say I completely followed that data analysis, but I'm glad you are happy with the results.
Here is a simple comparison...
I swam the same distance in the same pool on 7/08/96 in 6:21
On this swim, 20 years later I swam 6:55....losing only :34 in 20 years is solid for me ....most of the age group world records fall off much faster...(I use FINA 400 meter age group world records as a comparison...a very close distance)
I wish my mile run times would have only eroded as much......
That is impressive. Why do you think the change in swimming is so different from running?
And why is Ian fast at running, biking and swimming? :-)
I am trying to explore the first question....I am guessing my extreme inflexibility limits my run speed but doesn't limit (as much) my swim speed.....only a guess.
Ian, he is sneaky good.....obviously most think of him as a great Orienteer but his swimming is very solid (he is a bit faster than me) and his biking speed and pure run speed is very good also....If we had wanted to be a good age group triathlete he would be very very good...based onn his few triathlons over the last decade I suspect you could..put him on a triathlon bike with race wheels, train him for time trialing and he would record some very good bike splits......and he can run off the bike also.....He has a very good engine, mine has always been a bit suspect