I use to tense my legs every nite in bed cud this be what made them sore? like the pains i get in them now? crampy/annoying pains?

Consistent, Ongoing?: Sustained muscle contraction, all muscles, also compresses the blood vessels within which supply blood flow. Thus if the sustained contraction(s) are enough/recurrent vs. Blood flow, muscles cells become ischemic, go into anaerobic metabolism, secrete lactic acid, etc., & become sore, if still happening, even though not consciously aware while asleep/dreaming, then yes, this is quite consistent.