As studies showed the systematic method of the product of the increased biological activity after the two-time physical load of the second experiment group of animals and between the loads of the first experiment group was caused an increase in the general activity of lactate dehydrogenise, with that reliably higher than second experiment of the groups of rats, which accompanied a stable increase in all reducing periods of the subunit of lactate dehydrogenise "M" in comparison with the first experiment and the control room of groups.