Aerobic exercise
Learning Center
Erectile dysfunction: Viagra and other oral medications
Get the facts on medicines that are taken by mouth for ED.
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.
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.
Forgiveness: Letting go of grudges and bitterness
Forgiveness and letting go can lead to healing and peace.
Guide to different tick species and the diseases they carry
Learn about different tick species and some of the diseases they may carry.
HPV vaccine: Who needs it, how it works
Learn about how the HPV vaccine works, who needs it and what side effects to expect.
Hand-washing: Do's and don'ts
Done properly, hand-washing is a simple way to prevent the spread of germs and avoid getting sick.
Healthy sperm: Improving your fertility
You can take simple steps to have healthy sperm and improve your fertility.
Herd immunity and COVID-19: What you need to know
To protect groups of people over time, it helps to know what level of recovery or vaccination in a population makes it hard for a germ to spread.
Home birth: Know the pros and cons
Understand the possible risks and how to plan and prepare for a home birth.
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