HOW IT WORKS
Administrators place special suction cups on a subject’s body, which pull skin and blood vessels away from the muscles (hence the dark marks). It’s meant to improve circulation and loosen up tissue, muscles and joints.
WHY IT’S TRENDY (AGAIN)
Swimmers say cupping helps prevent soreness, promote faster recovery and/or make muscles move more easily. In traditional Chinese medicine, it’s thought to help improve the body’s chi, or energy flow.
WHAT SCIENCE SAYS
A 2010 review of 550 clinical studies found evidence that cupping may help ease pain without any serious side effects. Some question whether there’s enough data to prove that it is definitely effective.
More Must-Reads From TIME
- Why We're Spending So Much Money Now
- The Fight to Free Evan Gershkovich
- Meet the 2024 Women of the Year
- John Kerry's Next Move
- The Quiet Work Trees Do for the Planet
- Breaker Sunny Choi Is Heading to Paris
- Column: The Internet Made Romantic Betrayal Even More Devastating
- Want Weekly Recs on What to Watch, Read, and More? Sign Up for Worth Your Time
Contact us at letters@time.com