An author's credentials can determine a health source's credibility. None of the other options would apply to credibility. When it comes to health, if you want to make sure that what you are researching or reading is authentic and reliable you need to find out whether the author is a professional health expert or not. You can do this by finding out their credentials.
So you won't sprain any muscles or hurt yourself.
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The hormonal method of birth control interferes with the hormonal balance in a woman’s body in order to hamper fertilization, ovulation or fertilized egg implantation.
Women can become infertile
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Aerobic Fitness or Cardiorespiratory Endurance - the ability to deliver oxygen and nutrients to tissues, and to remove wastes, over sustained periods of time.
Any activity you do from taking a walk to washing the dishes it requires oxygen.
Regular aerobic fitness exercise increases your body's ability to use oxygen. How well you use oxygen is termed your "aerobic capacity." When your aerobic capacity is high, your heart, lungs and blood vessels efficiently transport and deliver large amounts of oxygen throughout your body. Aerobic exercise helps you in your daily activities.
Explanation:
in other words they are related
hope i helped
