Aerobic exercise
Learning Center
Walking: Make it count with activity trackers
If walking is your main form of physical activity, see how activity trackers can help you set and achieve your fitness goals.
Alzheimer's stages: How the disease progresses
Alzheimer's stages — common behaviors as the disease progresses.
10,000 steps a day: Too low? Too high?
Work up to a goal of walking 10,000 steps each day, depending on your starting fitness level, for numerous health benefits.
Low potassium (hypokalemia)
Low potassium (hypokalemia): Symptom — Overview covers what can cause this blood test result.
Unexplained weight loss
Unexplained weight loss has many causes — some serious. Find out when losing weight without trying calls for a medical evaluation.
Wheezing
Wheezing: Symptom — Overview covers definition, possible causes of this symptom.
Headache
Headache: Symptom — Overview covers definition, possible causes of this painful symptom.
Anal pain
Anal pain: Symptom — Overview covers definition, possible causes of this common symptom.
Aerobic exercise: Top 10 reasons to get physical
Need inspiration to work out? Consider the top 10 benefits of aerobic exercise.
Heartburn or heart attack: When to worry
Chest pain? Learn the potentially lifesaving difference between heartburn and a heart attack.
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