Wow, what a great thread of advice! I've been told about how to set a bike before, but never with so much detail as you guys have offered, so thank you for that.
I don;t know how true this is, but I was told that the muscle groups that get worked most during cycling are the "opposite" to those used when walking up stairs - ie, cycling works one set, but stairs stress others - this might be why you notice the discomfort after cycling. I can't add any weight to that statement with links or anything, but needless to say I too experienced these discomforts when I first started cycling again. It faded with time.
I don;t know how true this is, but I was told that the muscle groups that get worked most during cycling are the "opposite" to those used when walking up stairs - ie, cycling works one set, but stairs stress others - this might be why you notice the discomfort after cycling. I can't add any weight to that statement with links or anything, but needless to say I too experienced these discomforts when I first started cycling again. It faded with time.