Kinetic Analysis of Crouching Start Depending on Taping Applied to Hamstring in Elite Male Sprinters / 대한스포츠의학회지

Purpose@#This study was aimed to identify the effect of taping applied to both hamstring on the horizontal velocity of the center of mass (COM) and the angle and peak angular velocity of the knee and hip joints in the sagittal plane during the crouching start. @*Methods@#Seven elite sprinters (three male 100-m sprinters and four male 400-m sprinters) who enrolled in Korea National Sport University and placed in the National Sports Festival participated in this study. The crouching start is divided into four separate phases by the five events: set position (E1), rear block exit (E2), initial contact of rear leg (E3), take-off of rear leg (E4), and initial contact of front leg (E5). The angle (°) of knee and hip joints in each event and the velocity of COM (m/sec) and peak angular velocity (°/sec) in each phase were analyzed before and after the application of kinesiology taping (KT) on both hamstring and placebo taping (PT). @*Results@#There were no significant differences in the velocity of COM and the angle and peak angular velocity of knee joint among the taping conditions. In 400-m sprinters, the front hip joint with KT or PT flexed less than without taping at E1 (p=0.039), E4 (p=0.018), and E5 (p=0.018). Also, during the phase from E1 to E2, the rear hip joint with both KT and PT extended at lower angular velocity compared to without taping (p=0.018). @*Conclusion@#While taping may be a beneficial practice for elite sports performance, the application of KT on both hamstring does not enhance sprinters’ start performance.

Kinetic Analysis of Crouching Start Depending on Taping Applied to Hamstring in Elite Male Sprinters / 대한스포츠의학회지

Purpose@#This study was aimed to identify the effect of taping applied to both hamstring on the horizontal velocity of the center of mass (COM) and the angle and peak angular velocity of the knee and hip joints in the sagittal plane during the crouching start. @*Methods@#Seven elite sprinters (three male 100-m sprinters and four male 400-m sprinters) who enrolled in Korea National Sport University and placed in the National Sports Festival participated in this study. The crouching start is divided into four separate phases by the five events: set position (E1), rear block exit (E2), initial contact of rear leg (E3), take-off of rear leg (E4), and initial contact of front leg (E5). The angle (°) of knee and hip joints in each event and the velocity of COM (m/sec) and peak angular velocity (°/sec) in each phase were analyzed before and after the application of kinesiology taping (KT) on both hamstring and placebo taping (PT). @*Results@#There were no significant differences in the velocity of COM and the angle and peak angular velocity of knee joint among the taping conditions. In 400-m sprinters, the front hip joint with KT or PT flexed less than without taping at E1 (p=0.039), E4 (p=0.018), and E5 (p=0.018). Also, during the phase from E1 to E2, the rear hip joint with both KT and PT extended at lower angular velocity compared to without taping (p=0.018). @*Conclusion@#While taping may be a beneficial practice for elite sports performance, the application of KT on both hamstring does not enhance sprinters’ start performance.

The Analysis of Global Positioning System Variables Related to Non-contact Injury in College Football Player / 대한스포츠의학회지

Purpose@#This study aimed to investigate the relative workload via a global positioning system (GPS) unit that was related to noncontact injuries in the lower extremities of college football player. @*Methods@#Data were collected from 18 players who were enrolled in a university football team using a GPS unit during competitions. The noncontact injury in the lower extremities were recorded for each competition by well-trained medical practitioners. Players’ ratio of acute to chronic workload (ACWR) of each GPS variable was calculated by dividing the most recent 1 week (acute) workload by the prior 4 weeks (chronic) workload. The ACWR in the time of player’s injury (injury-related block) was compared to the time before the injury-related block (preinjury block) and from the beginning of the data collection to the point of injury (total injured average), and the end of the data collection (total non-injured average). @*Results@#Eight players suffered 12 injures, indicating that an incidence rate was 13.28 injuries per 100 athlete exposures. Injured player had a higher ACWR of repeated high-intensity effort bouts (RHIE) and work-rest ratio (WRR) in the injury-related block compared to the preinjury block (F=3.151, p=0.039 and F=7.577, p=0.001, respectively). Also, they had a higher ACWR of maximal velocity (MV) in the injury-related block and total injured average compared to total non-injured average (F=5.592, p=0.004). @*Conclusion@#This study illustrated that the high ACWR in RHIE, WRR, and MV in the injury-related block may be related to noncontact injuries in the lower extremities of college football player. Many questions remain, but the results of this study may provide coaches and staffs in college football with useful quantitative information on preventive approach to sports-related injuries.

Reversible protein - losing enteropathy as a cause of severe hypoalbuminemia in a patient with multiple renal abscess / 대한내과학회지

Protein-losing enteropathy is characterized by excessive protein loss into the intestinal tract in association with various disorders. We report a case of reversible protein-losing enteropathy as a cause of severe hypoalbuminemia in a patient with multiple renal abscesses. A 61-year-old woman presented with high fever and left flank pain. Abdominal computed tomography showed multiple abscesses in the left kidney. E. coli was cultured from her blood. Although hypoalbuminemia was severe (1.9 g/dL), the liver function tests including prothrombin time were normal and urine protein was negative. The results of 99mTc-human serum albumin scintigraphy were compatible with protein-losing enteropathy. Alpha-1 -antitrypsin clearence was 89 ml/24 hours (normal range <13 ml/24 hours). After the renal abscess was improved with antibiotic therapy, serum albumin increased to normal range and protein-losing enteropathy disappeared.

Diabetic Ketoacidosis after Steroid Administration for Minimal Change Disease / 대한신장학회잡지

Although diabetic ketoacidosis is relatively common in primary diabetes mellitus, it is very rare in diabetes mellitus secondary to steroid therapy. We here present a case of diabetic ketoacidosis after steroid administration for minimal change nephrotic syndrome. A 29-year-old man was first admitted with generalized edema and massive proteinuria. He had no past history of diabetes mellitus. Kidney biopsy revealed minimal change disease and he was treated with prednisolone(1mg/kg). Eight weeks after steroid treatment, proteinuria disappeared completely and steroid dose was decreased by 10mg in a week. Nine weeks after steroid treatment, diabetes mellitus newly develped and it was well controlled with insulin therapy. As prednisolone dose was decreased, insulin requirement also diminished. When he was taking 30mg of prednisolone, insulin therapy was stopped because of good glycemic control. He complained of vomitting and abdominal pain, and tachypnea a week after withdrawl of insulin. Laboratory findings revealed severe diabetic ketoacidosis. Steroid was stopped and he was treated with fluid, insulin and potassium. Now he is beibg successfully treated with 20 unit of NPH insulin without relapse of nephrotic syndrome.

A Case of Furosemide Induced Acute Interstitial Nephritis / 대한신장학회잡지

Drug-induced acute interstitial nephritis is characterized by renal interstitial inflammatory cell infiltration and commonly presents as acute renal failure. This is caused mainly by methicillin, non-steroidal antiinflammatory drugs, sulfonamide diuretics such as thiazide, but cases induced by furosemide are rare. We report a patient with acute interstitial nephritis causing reversible acute renal failure and dermatitis while she was taking furosemide. A 37-year old woman was referred to our hospital because of generalized skin rash and non-oliguric acute renal failure. She had peripheral eosinophilia (1,577/mm3) and serum creatinine level of 6.8mg/dL. Skin biopsy showed leukoclastic vasculitis and percutaneous renal biopsy showed severe interstitial infiltration of lymph ocyte and mild interstitial fibrosis with focal tubular atrophy. After withdrawal of furosemide, renal function and skin lesions were completely recovered.