I am 10 yrs post CABG patient with CAD. I am hypothyroid, hypertensive, hyperlipidemia (all controlled with medicine) and have fibromyalgia. Once in a while I experience pain in my shins even when I have not done anything to precipitate the pain. It usually wakes me while I'm sleeping. I'm 63 years old and in good health other than the heart attack and CABG. Is it from lack of exercise?