AEROBICS STRENGTHENS THE HEART and lungs and builds endurance. For those who wish to reduce weight, aerobics is also a ‘must-try’.
Though some suggest that we need to do aerobics for a minimum of 30 minutes at least three times a week, some experts say that 20 minutes at least thrice a week would suffice.
Reader’s Digest: How to do Just About Anything (The Reader’s Digest Association, Inc., Pleasantville, New York, 1986) explains that aerobic means “occurring in the presence of oxygen.” Doing it “stimulate[s] more rapid and efficient transport of oxygen through the bloodstream. Oxygen is needed to burn the fuel (calories) that provides the energy for the exercise. In essence, the blood flow to the heart increases, requiring the heart to pump harder. Since the heart is a muscle, the harder it pumps, the stronger it becomes.”