See Matt Lauer get ‘cupped’ like Michael Phelps live on TODAY

The dark circles seen on such Olympic athletes as Michael Phelps in Rio have revived interest in cupping, a form of traditional Chinese medical therapy in which suction is applied to areas of the skin for supposed health benefits. Dr. Kevin Pierce of the U.S. Olympic medical team explains the practice and performs a live demonstration on TODAY’s Matt Lauer. (Run time: 3:45)