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PHYSICAL EDUCATION CLASS - XII MARKING SCHEME TERM …

glycogenephoscoratine, potassium etc. by doing regular exercise. These chemical substances increase the speed of blood. 6. Proper Blood Circulation: During rest, the blood completes a round of the body in 21 seconds, but it completes the round in just 15, 10 or 8 seconds while exercising. The heart muscles work faster during exercise. 7.

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