Never heard of this before, but it is coming up more and more lately.
https://www.boston.com/news/local-news/2024/09/23/what-is-rhabdo-and-why-are-some-tufts-lacrosse-players-still-hospitalized-with-it/
Rhabdo: Why were 12 Tufts lacrosse players hospitalized?
Rhabdo is a syndrome where muscle cells break down and enter the bloodstream, which causes damage to multiple organs, especially the kidneys.
https://www.boston.com/news/local-news/2024/09/23/what-is-rhabdo-and-why-are-some-tufts-lacrosse-players-still-hospitalized-with-it/I was here early in 2021, then got "spooked". I am back because I want to live. I read a lot. I observe. I listen. I have faith in us.
Gym Goer's Arms 'Exploded' After CrossFit Workout Challenge
Jessica Johnson's arms swelled after she tried the rigorous 'Murph Challenge', a popular CrossFit workout. Swollen limbs can be a symptom of a rare, but potentially lethal, condition known as rhabdomyolysis.
https://people.com/gym-goer-arms-exploded-swelling-crossfit-murph-challenge-rhabdomyolysis-8717424