Stretching and flexibility
Learning Center
A guide to basic stretches
Stretching — Stretch safely with this guide.
Ankylosing spondylitis
Learn about this inflammatory disease that can cause some of the vertebrae in the spine to fuse over time.
Blood donation
Find out what to expect during blood donation and how your blood will be used to help others.
Different types of COVID-19 vaccines: How they work
Find out how different COVID-19 vaccines cause your body to create antibodies that will fight the COVID-19 virus.
Feminizing surgery
Find out how feminizing surgical procedures can help better align the body with a person's gender identity.
Golf stretches for a more fluid swing
Golf stretches help promote a more fluid golf swing. And that could boost your game.
Masculinizing surgery
Find out how masculinizing surgical procedures can help better align the body with a person's gender identity.
Multiple sclerosis
This nervous system disorder causes a range of symptoms — and while there's no cure, it's possible to have long periods of remission.
Stretching: Focus on flexibility
Learn why stretching your muscles is an important part of your exercise routine and how to do it safely.