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percieved effort is a rubbish measure
so much this. it's amazing to see how power needs to jump to get you up to speed but then maintaining speed requires mush less effort - or as i am now discovering i can keep up the effort level and and go up another gear whilst maintaining similar cadence
also my perceived effort is from how hard my legs push. so dropping down a gear and spinning faster i can produce more power for much less perceived effort.
I recently rode a 15km undulating strava section With a friend on my Wheel, so she could set a PB. I rode it relatively calmly. Making sure I didnt push too many watts up the hills. My own PB was set during an all out leg busting effort.
I was totally shocked when I saw I'd beaten my PB.
Worth noting that pulling back a mere 5w from Your limit feels 20w easier. So percieved effort is a rubbish measure. But I was still shocked.