
Originally Posted by
OakLeaf
I'm going to take a wild guess and speculate it's your core strength. You start getting tired, your lower back sags in, your pelvis tilts forward, and your soft tissues pay the price. Sometimes you can rearrange yourself and be okay afterwards. Other times you're just too tired.
Does that sound right?
that would be my guess, too. Saddles don't magically fit, then magically not fit, then moments later magically fit again. But posture/core can be good, then bad, then moments later good again.
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