What is exercise Knowing the basic rules and benefits of
exercising and regular physical activity can undoubtedly reap
beneficial rewards in the long-term. Increasingly, exercise and
physical activity are treated as one and the same thing.
However, there is a big difference between the two. Physical
activity is any type of body movement produced by muscle
contraction and which burns calories. Exercise is a subcategory
which is measured by amount, intensity and frequency and
involves certain repeated movements which are structured to
improve or maintain one or more physical components. Aerobic
activities are exercises that move large muscle mass in legs,
torso and arms with cyclic and repetitive movements. They
involve moderate or light effort over sustained periods of time
(at least 15 minutes). For instance some typical aerobic
exercises include walking, swimming, running, cross-country
skiing and skating. The intensity of aerobic activity is
measured by heart rate. Improvements from regular aerobic
activity