Nine players were hospitalized with a rare and serious muscle condition known as rhabdomyolysis after training with a Navy SEAL graduate.

Twelve athletes were diagnosed with rhabdomyolysis or "rhabdo" after a workout led by a recent graduate of the Navy SEAL training program.

Three members of the Tufts University men’s lacrosse team remained hospitalized Monday with rhabdomyolysis, and team practices remained postponed, one week after multiple players got sick, officials said.