(WJBK) - Have you wondered why our most decorated Olympian is covered in large circular bruises? Those marks are from an ancient Chinese remedy called cupping.
Michael Phelps along with many other Olympians have beening using the method to relieve pain for years.
Lucas Zdenek from Essential Massage in Ferndale joins us on The Nine to teach us about cupping and show us how it works. You can watch in the video player above.