Aerobic means "with oxygen," and aerobic exercise trains the body to use oxygen more effectively. Aerobic exercise involves continuous movement of the large muscle groups that causes one's heart rate to increase.
Regular aerobic exercise results in a more efficient heart. Oxygen travels through the blood, and a heart that can pump more blood with fewer beats per minute is a healthier heart. Exercising for twenty to sixty minutes (depending on your fitness level) per session is usually enough for most people to maintain heart health.
Regular aerobic exercise has shown to have a host of benefits in addition to improved cardiovascular health. It can help the body manage insulin more effectively, improve one's overall outlook, and improve sleep, among many other positive side effects.
Aerobic exercise can also help maintain joint and bone strength. You can get an aerobic effect from some weight workouts too when the rest interval is short and the workout makes you breath hard and we know weight-bearing exercises promote bone health don't we?
Remember though that if you want your aerobics to help you get the weight off you need high intensity aerobics.
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