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Healthy women, as well as women with cardiovascular disease, can improve their general health through aerobic exercise. This welcome improvement is the result of your cardiovascular system's increased ability to use oxygen to derive energy for work. How does this happen?
Cardiovascular training increases maximum oxygen uptake by increasing both maximum cardiac output, which is the volume of blood ejected by the heart per minute. This in turn determines the amount of blood that will be delivered to the working muscles, as well as the ability of muscles to extract and use oxygen from blood. Simply put, the more oxygen that is sent to your muscles, the more energy you will have throughout the day. According to extensive studies, middle aged women who work in physically strenuous jobs have fewer incidences of coronary artery disease than their inactive co-workers.