Final answer:
Out of the given options, fewer calories being burned because of an increase in muscle mass is NOT a benefit of being physically fit. The other given options - increased metabolic rate and stronger heart and lungs - are all benefits of being physically fit.
Step-by-step explanation:
Out of the given options, fewer calories being burned because of an increase in muscle mass is NOT a benefit of being physically fit. When you have more muscle mass, your body actually burns more calories, even at rest. This is because muscle tissue requires more energy than fat tissue. So, having an increase in muscle mass actually helps in burning more calories, not fewer.
On the other hand, the other given options are all benefits of being physically fit:
- Your metabolic rate is increased: When you are physically fit, your body's metabolic rate increases, meaning that your body is able to burn calories more efficiently.
- Your heart and lungs are stronger: Regular exercise and physical fitness improve cardiovascular health, making your heart and lungs stronger.
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