One way in determining your fitness level is trying to do a Full Sprint Run and holding your breath for as long as you can. That way you can determine your cardiovascular capacity and lung capacity. On improving your fitness levels you should do swimming, jogging and of course a balanced diet.
Your basal metabolism is the number of calories required to keep your body functioning at rest. People who weigh more are more likely to have a faster basal metabolic rate.
I think the answer is "to manage stress improvement in appearance".
I say this because if you increase your self-esteem, there would be no reason to worry about appearance. Stronger bone mass increases the bone marrow mass - which produces more blood cells (good for the cardiovascular system). If you manage stress, your heart rate would not increase (good for the cardiovascular system)
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