<p align="justify"> </p><p class="resumenyabstract" align="justify">The effects of maximal dynamic exercise (sprint) has been studied on the ECG of 100 greyhound who run in programmed 350 m races. Two ECG were taken in each animal: one before the race and the other after the effort. After the race there is a significant increase of the voltage in the waves P... https://manhattanscasualers.shop/product-category/cardigan/