Aerobic exercise
Learning Center
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.
5K run: 7-week training schedule for beginners
5K run — Make it to race day in seven weeks.
A1C test
Learn more about the preparation for and results of this common diabetes blood test.
ADHD diet: Do food additives cause hyperactivity?
Better research is needed to find out if limiting certain foods or food additives will help reduce hyperactivity and ADHD symptoms.
ANA test
An antinuclear antibody (ANA) test is one test used to help determine if you have an autoimmune disease such as lupus.
Absence seizure
This type of seizure produces symptoms such as a vacant stare, lip smacking and eyelid fluttering.
Acetaminophen and children: Why dose matters
This medicine is an effective pain reliever, but an overdose can happen all too easily. Follow these tips to keep your child safe.
Acute flaccid myelitis (AFM)
Know the possible symptoms of acute flaccid myelitis (AFM), a rare but serious condition that affects young children.
Adrenoleukodystrophy
Find out about diagnosis and treatment of adrenoleukodystrophy — a hereditary disorder that affects the brain, nervous system and adrenal gland.
Aerobic exercise: How to warm up and cool down
Learn how to warm up and cool down the safe way.
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