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.
For example, the more you exercise aerobically, the more mitochondria the body makes to produce more energy to meet your needs, which is one reason how -- and why -- regular cardiovascular exercise actually creates more available energy for your body, says Heller.