Strength training
Learning Center
COVID-19 antibody testing
Learn how COVID-19 antibody testing is done to find out if you've had a past infection with SARS-CoV-2, the virus that causes coronavirus disease 2019.
COVID-19 and pets: Can dogs and cats get COVID-19?
Find out how COVID-19 can affect dogs and cats, what you can do to protect your pet, and how to care for your pet if it becomes sick.
Bump on the head: When is it a serious head injury?
Even a minor injury to the scalp or forehead can cause a large lump. Find out when it's time to see a healthcare professional.
Bullous pemphigoid
Learn about the symptoms, treatment and self-care strategies for this blistery skin condition that affects older adults.
Bulging disk vs. herniated disk: What's the difference?
Compared with a bulging disk, a herniated disk is more likely to cause pain because it protrudes farther and is more likely to compress nerve roots.
Broken collarbone
This common injury is usually the result of falling, playing sports or being in a traffic accident.
Boost your calcium levels without dairy? Yes you can!
Which foods pack a healthy dose of calcium? There're plenty of options, even if you don't do dairy.
Body-weight training: Is it effective for strength training?
Body-weight training — Try out this alternative form of strength training.
Blood pressure: Is it affected by cold weather?
Blood pressure generally is higher in the winter than in the summer. Discover why.
Blood donation
Find out what to expect during blood donation and how your blood will be used to help others.
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