Original scientific paper
Effect of muscular training on urinary 17-ketosteroids
Drenka Davidović-Milovanov
; Odeljenje za eksperimentalnu fiziologiju i fiziologiju rada Instituta za medicinska istraživanja u Beogradu
S. Sekulić
; Odeljenje za eksperimentalnu fiziologiju i fiziologiju rada Instituta za medicinska istraživanja u Beogradu
Abstract
The changes in the elimination of 17-ketosteroids in the urine due to short-lasting intense muscular work in the course of training have not yet been fully explained. The problem was studied in untrained healthy students-volunteers aged 20-22 in conditions of everyday muscular work, for 13 days, before and after the exercise as well as during restitution 5 hours after the cessation of work. The determination of 17-ketosteroids in urine was carried out quantitatively using own modification of the Zimmermann reaction. The exercise on the Muller's bicycle ergometer was performed every day at 8 a. m, with a Ioad of 1500 mkg/min, while the total maximal load was 18.000 kgm for a 12-minute work. All healthy subjects were not able to endure the load, so that only those who accomplished this very strenuous exercise, remained in the experiment. The results are shown in tables and graphs. A difference was found in the mean 17-ketosteroid values before and after muscular effort. In untrained persons muscular effort induced a short increase in the 17-ketosteroid elimination. This effect was most marked the first day of training, it was Iess the following days, and completely disappeared at the end of the 13-day period. During restitution (a 5-hour rest after work) the urinary 17-ketosteroid values were lower than before work. This late effect of muscular effort on the elimination of 17-ketosteroids in urine was in agreement with the results of the authors earlier Investigations which had shown that a few hours after the muscular effort the 17-ketosteroid elimination is diminished. The training was not found to produce any changes in this late effect of muscular work on the 17-ketosteroid elimination.
Keywords
Hrčak ID:
173623
URI
Publication date:
16.9.1970.
Visits: 1.162 *