hahahahaha. those annoying little muscles drive me completely bonkers, too.
sitting on yer butt.
which places them in a shortened position. over time they become shorter.
then it becomes much more comfortable to sleep with them curled up a bit, too.
which places them in a shortened position.
you get the idea.
then when you do your stuffs trying to stretch them out (e.g., standing quad stretch, lunges) you get some really bad knots in them!
this is long. and in many ways really very boring. but it might help you out a lot:
maybe it isn't these muscules... but worth a look...
some people do get them surgically lengthened... but you can do it with soft tissue work. you can.