Training for hills HR Monitor

Hi all, I've a very hilly sportive in 3 months time (Ayrshire Alps) with long 1.5 - 2 mile climbs from 4% to 8% 7 climbs in total. Just completed a 100km sportive over the weekend (Drumlanrig) and felt pretty good over the climbs but want to improve for this one. Using a HR monitor how can I use it and it's zones to improve my power and speed over the climbs?
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Posts
https://help.trainingpeaks.com/hc/en-us ... te-or-Pace
Then set your zones
https://www.endurancepath.com/resources ... alculator/
These are Joe Friel's recommendations, others are available.
Voltaire
A good starting point would be 4-5 intervals of 5-6 minutes duration at threshold HR with 2-3 minutes easy pedalling in between each interval. If that is easy enough then either up the interval duration or the number of intervals (or both). If it's too much then decrease.
On the flat try to do some aerobic efforts as well. A solid 45-60 minute ride at around 80% of max HR a couple of times a week should improve aerobic fitness and also contribute to your ability to carry out the interval work.
Or ride them as smartly as you can.
https://www.cyclingweekly.com/news/latest-news/the-25-most-stylish-cyclists-of-all-time-160810
Voltaire
While the training suggestion is fine, the problem with using HR to guide such efforts (if ridden correctly) is HR takes a couple of minutes before reaching the "zone". If HR rises up to "zone" quickly it means you are going way too hard for the intended effort and you will likely struggle to maintain pace for the duration (although HR may remain elevated since you are dealing with replenishing an O₂ deficit).
HR lags effort, so for guiding shorter efforts it loses its utility. It's a bit like driving a bus while only looking in the rear view mirror.