Abstract

Leptin is a protein produced by matured, full fat cells, which considerably influence the energy metabolism of the body cells, and has probably one of the decisive functions in reduction of body weight. The leptin concentration in serum can be considered as an indicator of the amount of fatty tissue in the cells. Although a clear relationship between energy intake and plasma leptin concentrations has been demonstrated in humans, little is known about
the effect of exercise on leptin metabolism. The purpose of this study was to assess the effect of acute exercise (30 min of 60 % intensity cycle ergometer
exercise) on plasma leptin levels. Research was also focused on assessing the relationships among leptin concentrations and indices of obesity and their effect on the cardiovascular system. Plasma leptin concentrations were significantly lower after exercise than before and varied from the values obtained during resting conditions. The recorded and statistically processed values of serum leptin, BMI, body fat (%), WHR and cardiovascular efficiency (indices of CHR-test) were used for calculation of mutual relations to these parameters. Leptin correlated positively to the amount of body fat and body mass index and negatively to the indicators of cardiovascular system efficiency. It is concluded, that exercise training can reduce the plasma leptin levels. Verf.-Ref.