For the past month (give or take a week) I've been
having the following occur during my normal lunch rides.
the tendons from Hamstrings to knee (anterior aspect) are
becoming sore (almost fatigued like lactic acid buildup). The
rides are the same, the intensity is about the same as all summer
and fall (maybe a bit less intense due to winter slowdown).
I haven't got a clue as to what is causing it, nor how
to correct it.