Fitness basics
Learning Center
How fit are you? See how you measure up
Find your fitness level with these simple fitness tests.
How do COVID-19 antibody tests differ from diagnostic tests?
Antibody testing shows whether you've had the COVID-19 virus in the past. It's not the same as testing to see whether you have the virus now.
Holter monitor
This wearable device keeps track of the heart's rhythm during daily activities. Learn when you might need one and what to expect.
Hodgkin's vs. non-Hodgkin's lymphoma: What's the difference?
Learn how types of lymphomas are determined using lab tests to examine cancer cells.
Hematocrit test
Learn about this red blood cell blood test, including why it's used and what to expect.
Heart rate: What's normal?
A normal resting heart rate for adults ranges from 60 to 100 beats per minute. A heart rate above or below that may signal a problem.
HPV test
This test can help show the risk of cervical cancer. Learn more about how to prepare and what the results may mean.
Glucose tolerance test
These simple blood tests are performed to screen for diabetes. Your healthcare professional may suggest one or more of these tests depending on your risk factors.
Glucose challenge test
Know how to prepare for this gestational diabetes screening test.
Genetic testing
Genetic testing: Learn why it's done, how to prepare and what to expect from diagnostic tests, carrier tests, prenatal tests and newborn screening.
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