Strength training
Learning Center
Weight training: Do's and don'ts of proper technique
Weight training may look easy — but for best results, proper technique is essential.
Strength training: Get stronger, leaner, healthier
Strength training can help you look good — and feel even better.
Ankylosing spondylitis
Learn about this inflammatory disease that can cause some of the vertebrae in the spine to fuse over time.
Core exercises: Why you should strengthen your core muscles
Core exercises strengthen your abs and other core muscles for better balance and stability.
Exercises to improve your core strength
Use these core-strength exercises to tone your core muscles, including abdominal muscles, back and pelvis.
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.
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.
Isometric exercises: Good for strength training?
Learn more about isometric exercises that contract a particular muscle or group of muscles.