title: Judo nephropathy: trauma versus non-trauma.
abstract: Nine male judo players were studied to evaluate possible renal dysfunction after repeated falls. During a 15-second period a pair of subjects took two steps and one subject performed an arm throw upon his partner. The procedure was then reversed and he was thrown by his partner. This alternating exercise was continued for a total of hundred falls per subject. This protocol was carried out twice by each subject, once on a 10-cm mat, once on a 2.5-cm mat. The compressive forces after falling on both mats were 0 joules and 5,919 joules, respectively. Experimental blood and urine samples were collected at 1, 2, 4, 9, and 24 hours post-trauma. Twenty four-hour glomerular filtration rate (GFR) was significantly inhibited during the traumatic session (2.5-cm mat). For the non-traumatic session (10-cm mat) a 24-hour GFR increase of 73.88% was noted compared to control values. Both experimental sessions demonstrated significantly increased urinary protein. Electrophoretic analysis of the urine showed a marked predominance of albumin. Hematuria present after the traumatic session grossly discolored the urine. All non-traumatic samples failed to demonstrate the presence of red blood cells in pathologic numbers. In this investigation the precipitating factor for hematuria during exercise seemed to depend largely on the severity of the mechanical trauma, and not the exercise per se.
mesh_terms: D001265:Athletic Injuries; D005919:Glomerular Filtration Rate; D006417:Hematuria / Q000209:etiology; D006801:Humans; D007668:Kidney / Q000293:injuries*; D007674:Kidney Diseases / Q000097:blood / Q000209:etiology* / Q000652:urine; D008297:Male; D011507:Proteinuria / Q000209:etiology; D013177:Sports; D014949:Wounds, Nonpenetrating