A dozen players were diagnosed with rhabdomyolysis after a “voluntary [and] supervised” 45-minute workout held on Monday, a university spokesperson said. Seven players were treated in the emergency room and released from the hospital, he said.

A dozen players in all were diagnosed with rhabdomyolysis, a potentially life-threatening injury associated with overexertion.

A dozen Tufts University men’s lacrosse players have been diagnosed with a rare muscle injury after participating in a voluntary, supervised 45-minute workout that the team conducted, a