Core exercises
Learning Center
How to take your temperature
Learn how to get an accurate temperature reading at home, using common types of thermometers.
How to take your pulse
Learn two ways to take an accurate pulse, or heart rate.
How to measure your respiratory rate
Learn how to accurately measure your breathing rate, which is also known as your respiratory rate.
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.
Heart-healthy diet: 8 steps to prevent heart disease
Certain foods can raise your risk of heart conditions. Learn eight ways to get started on a diet that's good for your heart.
Healthy meals start with planning
It's easy to put healthy meals on the table with a little planning. This guide will show you how to create balanced meals with proper portion sizes.
Headaches: Reduce stress to prevent the pain
Headaches seem worse when you're under stress — and stress by itself can trigger headaches.
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.
HPV vaccine: Who needs it, how it works
Learn about how the HPV vaccine works, who needs it and what side effects to expect.
HDL cholesterol: How to boost your 'good' cholesterol
Generally, people who have naturally higher levels of HDL cholesterol are at lower risk of heart attack and stroke.
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