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.
Best Answer: Cycling is a good cardiovascular exercise, it will tone muscles. If you have legs that are flabby it will reduce their size. Fat takes up twice as much room as muscle for the same weight. If you have skinny weak legs it will make them a little larger as you gain muscle.