Fitness level means your maximum aerobic performance. Its golden standard measure is VO2max (maximal oxygen consumption). Oxygen is consumed in your body when your muscles work – the more they work the more oxygen is needed. A fit person is able to make his or her muscles to work more or longer without getting exhausted. When you get more fit you notice that you are able to do the same exercise easier than earlier – your fitness level has improved!
Modified on: Fri, 7 Nov, 2014 at 3:15 PM
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