Abstract - Event related potentials after acute bouts of exercise in female judo players
The aim of this study was to throw light on the influence of physical activity at different levels on the amplitude and latency of P300 component of cognitive potentials in female athletes. After registering cognitive event related potentials at rest participants underwent a controlled exercise on a cycle ergometer. Each exercise lasted for 10 minutes with successive increase of intensity up to 60%, 75% and 90% of maximal heart rate and holding this level of intensity for six minutes. Immediately after finishing each bout of exercise, event related potentials were registered again. The amplitude of P300 wave after exercise intensity achieved at 60% (Fz 14.02±6.33 μV; Cz 16.19±5.84 μV) and 75% of HRmax (Fz 13.22±4.68 μV; Cz 16.33±5.07 μV) were statistically higher (p<0.05) than the amplitude of P300 at rest (Fz 10.32±5.50 μV; Cz 12.41±3.43 μV) and after 90% of HRmax (Fz 10.38±5.68 μV; Cz 11.38±6.76 μV). In our study the effects of single bouts of exercise at different intensities seem to be positive on the amplitude of P300. Short duration medium intensity exercise corresponding to 60% and 75% HRmax facilitated cognitive processing in the CNS, whereas high-intensity exercise corresponding to 90% HRmax decreases cognitive functions.