One of the most disturbing aspects of the martial arts is the lack of adequate sports safety training among martial arts instructors. Deference to tradition regarding training methods and expectations of performance often blinds instructors to the intrinsic dangers associated with fight training. While it is probably impossible to ameliorate all of the dangers associated with fight training responsible instructors should make every effort to be aware of the symptoms of training related injuries, and related conditions.
Rhabdomylosis is potentially fatal condition coaches and trainers of all sorts should be aware of. It can be caused by excessive exercise, and other activities that traumatize skeletal muscle tissue like katakite, tanren, or even pummeling drills. When pounding and crushing activities are combined with intense physical activity the danger is probably greatest.
Here are a couple of links to articles of rhabdomylosys that may be useful for both instructors and trainees:
Rhabdomyolysis ( /ræbdoʊmaɪoʊlɪsɪs/ or /ræbdoʊmaɪoʊlaɪsɪs/) is a condition in which damaged skeletal muscle (Ancient Greek: rhabdomyo-) tissue breaks down rapidly (Greek: –lysis). Breakdown products of damaged muscle cells are released into the bloodstream; some of these, such as the protein myoglobin, are harmful to the kidneys and may lead to kidney failure.