zamm0 wrote:
Do "typical" (ectomorph type) bike/runners bulk up much in the shoulder/arm/back area when they start swimming more? I'm right around 35-36mins for 1.9K swim (off of very little swimming but OK-ish technique) but just wondered whether it's even worth trying to get that time down substantially if it's going to make me less aero on the bike?
Firstly don't worry about changes in body...worry about getting fast!
Yes there will be changes in your body, especially upper, mainly because you will be using those muscles more. Looking at some of the pure runners who try and switch to ITY, you can definitely see some muscle gain.
BUT!
If you become a better swimmer, you will A) be out of the water faster, B) around (generally) better athletes on the bike C) should be fresher coming out of the water
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