Since I'm starting a new block of training, and since I hadn't done it in 6+ months, yesterday I rotated the tires on the trainer wheels. The rear tire was getting a bit slick, and the front was untouched, so it was time for a switch. With the change, and for setting up training zones for the next 5 months, I was going to re-do the i-Magic calibration tonight.
The original plan was to calibrate, then do a brick, with 2x30 min @ 80% FTP, then run 2 miles @6.5 mph. This didn't happen. I warmed up the trainer for over 30 minutes, at unknown wattage (but it was harder than it should have been), then it tried to calibrate when I got out of the saddle and accelerated to relieve some pressure "down below". I knew the result couldn't be right, so I started playing with it, and even though it says "Keep speed at 30 km/h", it lies. If you do that, it sits. If you accelerate over 33 km/h, it kicks in. So after a number of attempts and adjustments to the tension on the rear wheel, I ended up at the same calibration factor as I had before. Joy.
This process took me over an hour, and I wasn't in the mood to do a second TT effort, so I punched out a quick 5 minute effort at 250w, then switched shoes and hopped on the treadmill. The plan to sit at a relaxed 6.5 mph last one mile. Then it was upped to 7 mph. Then I decided I needed another mile, this one at 8 mph, but halfway through that mile, the pace went up again to 8.5 mph. So much for all LSD training, and so much for a rest week.
(Although it felt REALLY nice to stretch my legs out for a while. I could've held that 8.5 for a long time at 4-4 breathing, so the endurance and strength is there. I may be adjusting my marathon pacing in a month or two.)
Bike: assorted efforts and times. I really haven't a clue of specifics.
Run: 1 mile @ 6.5 mph, 1 mile @ 7 mph, 1/2 mile @ 8 mph, 1/2 mile @ 8.5 mph, 5 minute cooldown
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Calibrating the iMagic sucks. I've noticed massive variations in calibration factors based on:
- Length of time taken to "warm up" the iMagic. Trying to calibrate after 10 minutes vs. 60 minutes will yield large deltas.
- The most minute change in air pressure in the rear tire will play havoc with the calibration factor.
- Looking at the screw that adjusts the rear tire tension will cause some sort of bizzare quantum change of state... leading to changed calibration factors...
And so forth.
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