Today I picked up a trainer tire for the bike, set up the fan, and rigged the iPad so I can watch streaming video while on the trainer. So with all that, it appears my indoor training setup is complete.
After this mornings race, I wanted to hit the trainer again, but I didn't want to put any additional real stress on my quads and legs, on account of the runners knee issues. So todays spin was at a reduced effort.
What is interesting is that for only being 1 mph slower (about 16.1 vs yesterdays 17.1) - my HR dropped from 155 to about 125. It is possible that the small speed difference makes that large a difference in HR, but I suspect something else - I'm just not sure what it is. It may be that the trainer tire has a lower rolling resistance, but I wouldn't think it would be that significant. If it is, I definitely have to see about getting new tires on my bike in the spring! I think a bigger difference was probably having some cooling going on - it takes a lot of effort for the body to cool itself, and yesterday I was sweating a lot more than I did today. Until I thought of that factor, I was starting to think I'd have a hard time correlating various spins to track improvement. Realistically, however - I care less about what the speed/HR correlation is, and more about its precision from one session to the next.
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