March Haemoglobinuria

Episodic haemoglobinuria due to haemolysis caused by repeated mechanical injury to red cells that travel through small vessels overlying the bones of hands and feet in long-distance marching—soldiers, marathon running, calisthenics, karate
Lab Myoglobinuria, proteinuria, increased BUN, increased enzymes—e.g., creatinine phosphokinase, increased lactic acid