Muscle injuries and dehydration can also trigger cramps. Dehydration is the excessive loss of fluids in the body. Low levels of any of the following minerals that contribute to healthy muscle function may also cause muscle cramps: calcium.
The heart is a part of the cardiovascular system in fact its the main part so if you have heart disease another way of saying this is you have cardiovascular disease.
1 Muscle exists as 3 types: cardiac muscle, smooth muscle, and skeletal muscle. Skeletal muscle is the target of strength and conditioning training. Smooth muscle makes up blood vessels and certain organs.  Skeletal muscle makes up approximately 45% of total body weight.