A 19-year-old China girl appeared in ICU after doing 1,000 squats to compete with her friend, AsiaOne reported.

Tang decided to challenge her friend to compare whose stamina was better. Two days after the incident however, the girl discovered that not only was she unable to bend her legs but her urine was also alarmingly brown.

It appeared that she was suffering from rhabdomyolysis, a serious condition that arises from direct or indirect muscle injury.