PURPOSE This study examined the effects of overnight sleep deprivation on recovery after competitive rugby league matches. METHODS Eleven male amateur rugby league players played 2 competitive matches, followed by either a normal night's sleep (~8 h; CONT) or a sleep-deprived night (~0 h; SDEP) in a randomized fashion. Testing was conducted the morning of the match, immediately postmatch, 2 h...

2120 CLINICAL CHEMISTRY, Vol. 40, No. 11, 1994 we reported here, we overcome this problem by using the filters. We have not observed any late-eluting peaks that would interfere with the subsequent chromatogram nor any reduction in column life attributable to sample contamination. Moreover, the results we obtained with the amperometric detector are comparable with those of the coulometric detector.

The regulation of the specific activities of adenylate kinase (EC 2.7.4.3) and creatine kinase (EC 2.7.3.2) in myogenic cell lines is independent of cell fusion. The observed increases in enzyme specific activities are cell density dependent, and may be further broken down into contributions from an increase in enzyme activity per cell and a decrease in protein per cell. Only the former appears...

The aim of the study was to evaluate usefulness determining markers myocardial damage, such as: aspartate aminotransferase, total creatine kinase, cardiac kinase isoenzyme, lactate dehydrogenase, dehydrogenase isoenzyme and peripheral blood lactic acid in sport horses subjected physical exertion. research carried out on 50 three breeds: Ukrainian Riding, Hanoverian Westphalian, aged 4-16 years....

Serum enzyme studies were made on 43 (37 male, 6 female) consecutive patients with ankylosing spondylitis. Serum creatine phosphokinase (CPK) activity was raised above 55 IU/l in 24 (65%) of 37 male patients (range 29-165 IU/l, mean 68) as compared with 2 (4%) out of 47 male controls (range 14-85 IU/l, mean 33: P less than 0-001); levels were greater than 35 IU/l in six (100%) out of six female...

In order to investigate the relation between the release of creatine kinase (CK) in acute myocardial infarction and the evolution of infarction, the appearance functions of CK (release of CK from the heart into the circulation) were calculated by the modified method of Sobel and associates from the serial determinations of serum CK activity in 50 patients with acute myocardial infarction. The r...