Aerobic exercise
Learning Center
10,000 steps a day: Too low? Too high?
Work up to a goal of walking 10,000 steps each day, depending on your starting fitness level, for numerous health benefits.
5K run: 7-week training schedule for beginners
Running a 5K? Make it to race day in seven weeks.
Aerobic exercise: How to warm up and cool down
Learn how to warm up and cool down the safe way.
Aerobic exercise: Top 10 reasons to get physical
Need inspiration to work out? Consider the top 10 benefits of aerobic exercise.
Ankylosing spondylitis
Learn about this inflammatory disease that can cause some of the vertebrae in the spine to fuse over time.
Aquatic exercises
Thinking about signing up for an aquatic exercise class? Or trying water exercises on your own? Check out these pool moves.
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.
Exercise intensity: How to measure it
To get the most out of exercising, aim for moderate to vigorous exercise intensity. See how to judge your exercise intensity.
Exercise: How much do I need every day?
Find out how much exercise you need and how to get it.
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.