Strength training
Learning Center
Heartburn or heart attack: When to worry
Chest pain? Learn the potentially lifesaving difference between heartburn and a heart attack.
Heart palpitations
Know when and how feelings of a rapid, fluttering or pounding heartbeat are treated.
Heart attack symptoms: Know what's a medical emergency
Watch for these heart attack symptoms.
Headache
Headache: Symptom — Overview covers definition, possible causes of this painful symptom.
Guide to different tick species and the diseases they carry
Learn about different tick species and some of the diseases they may carry.
Growth plate fractures
Growth plate fractures — This common childhood bone injury often needs immediate treatment as it can result in a shorter, longer or crooked limb.
GERD: Can certain medications make it worse?
Certain medications can aggravate symptoms of gastroesophageal reflux disease (GERD). Learn more.
Free weights or machines: Which are better?
Free weights are versatile and inexpensive. They also simulate real-life lifting situations and promote whole-body stabilization. Likewise, machine weights can be effective weight training tools, as long as you use machines that adjust to your body dimensions and allow full range of motion of your joints. What is the bottom line? Choose a weight training system that you enjoy and that fits into your lifestyle. And whatever type of resistance you choose, remember that proper technique is more important than the specific type of equipment.
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.
Flu symptoms: Should I see my doctor?
See a healthcare professional if you are at high risk for complications from flu.
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