He rushed her to Grey Sloan Memorial, where she was diagnosed with rhabdomyolysis, a potentially fatal condition that was caused by Maya’s excessive exercise.

Source: https://www.cinemablend.com/television/station-19-revealed-mayas-fate-in-midseason-premiere-but-what-does-that-mean-for-her-and-carina

One anonymous parent told the outlet their child was diagnosed with rhabdomyolysis, which in case you don’t know is a severe medical condition that occurs when damaged muscle tissue releases its proteins and electrolytes into the blood.

Source: https://perezhilton.com/multiple-high-schoolers-hospitalized-coach-forced-400-pushups-punishment/