Whatever the activity of your aerobic exercise, the whole point is to constantly increase the frequency of your heart beats. Good breathing technique is also important because it provides a rich supply of oxygen to maintain energy. To effectively strengthen the cardiovascular system you will have to exercise 4 times a week, spending at least 20 minutes to do, but no more than one hour. The duration of training for beginners is 5-10 minutes, gradually bringing it to an hour.
Ideally, aerobic and anaerobicheskie exercises should be done almost simultaneously. It would seem, strengthening the cardiovascular system, you can perform intense exercise with weights. But do not try to do it - the time and effort necessary for the physical adaptation in the aerobics and anaerobike, are quite different. Separating the two goals - strength and endurance - you'll avoid abnormal overloads and damage to health.
Except those miracles which makes aerobics with the cardiovascular system and pulmonary breathing apparatus, it also copes with the general and local increase in muscle tone and promotes intense fat burning. Combined with a variety of choice of all possible types of activity to determine which is best for you. All aerobic exercise affect the heart and lungs, so this criterion is not decisive.