Strength training
Learning Center
Exercises to improve your core strength
Use these core-strength exercises to tone your core muscles, including abdominal muscles, back and pelvis.
Flu symptoms: Should I see my doctor?
See a healthcare professional if you are at high risk for complications from flu.
Food allergy vs. food intolerance: What's the difference?
Might you have to swear off milkshakes for good? Follow the symptom clues to find out whether you possibly have a food allergy or a food intolerance.
GERD: Can certain medications make it worse?
Certain medicines can make symptoms of gastroesophageal reflux disease (GERD) worse. Learn more.
Guide to different tick species and the diseases they carry
Learn about different tick species and some of the diseases they may carry.
Headache
Headache: Symptom — Overview covers definition, possible causes of this painful symptom.
Heart attack symptoms: Know what's a medical emergency
Watch for these heart attack symptoms.
Heart palpitations
Know when and how feelings of a rapid, fluttering or pounding heartbeat are treated.
Heartburn or heart attack: When to worry
Chest pain? Learn the potentially lifesaving difference between heartburn and a heart attack.
Heavy menstrual bleeding
Learn about the causes and treatment of heavy menstrual periods.
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