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. Cardiovascular/aerobic exercise. 1  Cardiovascular fitness relates to the ability of the circulatory and respiratory systems (the heart, the blood vessels and lungs) to supply oxygen during sustained physical activity. It is also referred to as cardiovascular endurance, aerobic fitness and cardio-respiratory fitness.