What Causes Pain And Tight Sensation In The Legs?

When walking around a track for exercise my lower leg between my calf muscle and ankle on both legs becomes very tight and painful. This has been a chronic condition. The muscle in front of the bone also becomes very tight and painful with limited mobility. It starts after about 1/8 of a mile. I continue to limp around the track until I get 2 or 3 miles in but the pain is borderline unbearable. I am 43 years, 6 0 and 250 lbs and am a type 2 diabetic. I suffer from chronic joint pain in nearly all joints including my back and neck. I ve tried different track and tennis shoes but the problem persists no matter what I wear. Today I also noticed a couple of swollen bulges in my lower legs during my walk/limp.