Good morning. My Name is Dennis... History..Runner/40 to 60 miles a week, cycle 100 to 250 a week,have complete 200 small tris, 3 ironman.60 marathons. i am know 63 and have One big problem with my Left calf i have a sharp burning pain in my left calf. it only start burning and hurting when i am walking or try to run. when i cycle it does not hurt at all.i have had a MRI. Xrays. shots in my back and also had Ortho. doctorc look at it and they say that they see nothing. I need to get it fixed because it is really bothering me an keeping me from my nornal excerise. it has bee hurting for 2 years and it is getting worst. My wife and i are retired and are traveling around the us. We are ful time RV ers Help Dennis