open topic, for anything cycling related.
In Dec last year, I have altered the seat position (slightly raised and adjusted fore/aft) to better suit my pedalling efficiency (slightly modified version of the KOPS setup).
Obviously, this change has negatively affected my ride now I guess...
My bike log has these metrics:
Saddle height - centre of bb to top of saddle along the seat tube
Saddle fore-and-aft position (if the rails are graduated)
Reach - centre of bars to middle of saddle rails
Seat post offset
Bar height - centre of front axle to top of bars (height of spacer stack may be useful too)
If I start to feel uncomfortable I quickly re-measure in case something has changed. Saddle rail or seat post slippage is not uncommon. Then I review any recent changes and consider if I should make a further change or revert to the baseline measurement.
Any changes I make from my normal position are done in 5mm increments and logged.
I also log maintenance items, like the date and odometer reading when I replace chains and cassettes.
If you are into serious training then you need a training log too. To keep a note of things that your computer stats can't tell you, like the weather conditions, traffic, or how you were feeling e.g. your state of health and general well-being.
Cycle touring blog and tour journals: whispering wheels...
Don't bonk out in training rides imo.
Honestly if you want to do intervals, make it the focus of an hours riding, (ie warmup + 2x20 or warmup + 5x7) and then call it quits for the session. Hurting for me is running out of aerobic capacity towards the end of the effort, or legs unable to keep pushing so the average falls away. They aren't particularly sore, there is no joint pain, and nothing is numb, and my body isn't drained of resources by the effort to the extent that I go backwards instead of forwards.
After a 10 minute breather I can maintain usual cruising speed going home (because I am bike commuter, I need to ride back home again after finding somewhere trafficless to train), but I'd certainly warm down and stop after an interval.
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