Aerobic exercise
Learning Center
Did the definition of Alzheimer's disease change?
What the change in the research definition of Alzheimer's disease means for you.
Digestion: How long does it take?
Digestion takes about two to five days, depending on your system.
Discolored semen: What does it mean?
Find out what causes discolored semen.
Eastern equine encephalitis (EEE): What is it?
Find out more about a virus spread to people by mosquitoes, its symptoms and ways to prevent being infected with it.
Exercise intensity: How to measure it
To get the most out of exercising, aim for moderate to vigorous exercise intensity. See how to judge your exercise intensity.
Exercise: How much do I need every day?
Find out how much exercise you need and how to get it.
Exercising? Take it up a notch
Want to get the most out of your workouts? Try interval training! This simply means alternating bursts of intense activity with intervals of lighter activity. Take walking. If you're in good shape, try incorporating short bursts of jogging into your regular power walks. If you're less fit, alternate leisurely walking with periods of faster walking. (For example, if you typically walk outdoors, walk faster between certain mailboxes, trees or city blocks.) The more vigorously you exercise the more calories you'll burn, even if you increase intensity for just a few minutes at a time.
Fingernails: Do's and don'ts for healthy nails
Find out the signs of a problem with your fingernails, plus tips for taking care of them.
Focus on fit when shoe shopping
To find shoes that fit properly, try these tips: 1. Have your feet measured. Shoe size can change as you age. 2. Ask the salesperson to measure both feet. If one foot is larger than the other, try on a pair that fits your larger foot. 3. Shop for shoes later in the day after you've been walking for some time, when your feet are at their largest.
Foot swelling during air travel: A concern?
Swelling of the leg or foot while flying is common and usually harmless.
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