Requesting input and opinion...I am not sure what to make of it. I've had my latest bike 3 years now--gone thru 3 seats to fit properly....I noted at the end of 30kms each day on the week-end--I could feel strain thru the Top of my knees-a little on each side-mostly where I think muscle is drawing on the bones. Standing up and such--no such discomfort. After sitting down and Trying to stand up--same momentary owie.................so..............could it be the displacement on the latest seat is just off enough I am straining the knees--or--perhaps the post has wiggled a tad too low or perhaps too high--and that is the culprit?...........Or simply I am deconditioned?