There is this belief that having muscle and being tone/in shape is an indicator of fitness. That is not necessary true. If a person has a muscular and/or toned body, it means they'be been working that part of the body. It may be from work, or obsessively working out at a gym but that doesn't indicate fitness. The true sign of fitness is one's cardiovascular fitness. That is, how much the heart, lungs and associated muscles are used to performing a particular exercise for a period of time. Think of running, swimming, bicycling, and other activities that require a constant level of aerobic activity. Though my body is fairly toned, my fitness level currently comes from walking canines which is not particularly demanding on the heart. I have a higher level of fitness compared to someone who is sedentary but not particularly much higher. I should bike, swim or do something more aerobic but...
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