Aerobic exercise
Learning Center
Antidepressants for children and teens
Antidepressants are often effective in treating depression and anxiety in children and teenagers, but there are some risks. Learn more.
Antidepressants: Safe during pregnancy?
Medicines often are important for treating depression while pregnant. Weigh the risks and benefits with your health care team.
Anxiety disorders
Learn the symptoms of this mental health condition, and ways to manage worry and fear that interfere with your daily activities.
Aortic valve disease
Learn more about diseases that affect the valve between the heart's main pumping chamber and the body's main artery.
Aortic valve repair and aortic valve replacement
These types of heart valve surgeries are done to treat aortic valve disease, including aortic stenosis and aortic regurgitation.
Aortic valve stenosis
Learn more about the symptoms and treatment of this condition that reduces or blocks blood flow from the heart to the body.
Aquatic exercises
Thinking about signing up for an aquatic exercise class? Or trying water exercises on your own? Check out these pool moves.
Arteriovenous malformation
In this condition, a tangle of blood vessels affects the flow of blood and oxygen. Treatment can help.
Arthritis
Learn about how different types of arthritis affect joints in different ways, along with how to get relief from arthritis pain.
Arthritis pain: Do's and don'ts
Arthritis pain — To cope, strike a balance between activity and rest.
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