Ok, so i didn't add more info before.
-yes i had a bike fit last year, i believe good, person is known in my city and recommended (for sure my saddle is not too high or too far back)
-i ride all the time, maybe a bit less in winter. this year: 4kkm distance, 65km elevation)
-before, some discomfort could appear earlier, so at the end looks like body gets stronger.
-i doubt i pull my pedals on such long climbs (i try to keep it at 80%FTP)
-mine standard (weekdays) rides are shorter - 2-3h, with 10-20min climbs.
I belive it's connected with hip flexors (
Psoas?) - I stretch them (sitting work, sitting on a bike, bad bad bad
) - maybe not enough?
that's why I ask about other muscles, which i could train/make stronger to support my body.