<s>[INST] 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 [/INST] Hello Mr. Dennis. Your calf pain is due to calf muscle tightness. You might not have your arches of the foot supporting your foot resulting in loading your inner aspect of the calf...by rolling the foot inwards.Don't worry. I recommend you to do. Lot of icing frequently. Gentle massage over calf muscles... Gentle stretch for calf...both soles and gastrocnemius. Frequently. Arch support for your foot. Good running shoes... Proper weight training especially strengthening gluteus...to be done. Hope this is helpful for you... Kindly revert in case you need any further help in this regard... </s>