text: what is the best thing for fatigued/aching thigh muscles? i did paint balling yesterday, and all the hiding and crouching has left my thighs in agony!  where the paint balls hit, doesn't hurt too much though?!?  i've had a long, hot bath with radox and they still ache.  any useful suggestions? you have a build-up of lactic acid in your legs. you need to flush it out to ease your discomfort. a massage may help, so will lots of water and moderate exercise like walking. if nothing else, your discomfort will ease in a few days.