Aerobic exercise (also known as cardio) is physical exercise of relatively low intensity that depends primarily on the aerobic energy-generating process. Aerobic literally means "living in air", and refers to the use of oxygen to adequately meet energy demands during exercise via aerobic metabolism. Generally, light-to-moderate intensity activities that are sufficiently supported by aerobic metabolism can be performed for extended periods of time.
Read more about Aerobic Exercise: Aerobic Versus Anaerobic Exercise, Aerobic Capacity, Criticisms, Commercial Success
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“I assert that the first, and fundamental right of every woman is to be allowed the free exercise of her own belief; and that free exercise is not allowed when she is in any way restrained either morally or intellectually.”
—Margaret Anna Cusack (1829–1899)