The features of rhythm of heart-throbs are studied at implementation of single static and dynamic efforts with the deadweight of body for boys. 100 boys participated in research (age 10 - 11 years). The analysis of function of heart of teenagers was conducted through the method of method variational pulse rate. As static exercises utillized bending hands on a cross-beam and withholding of vertical position of body in support on the squared beams. As dynamic - at run on 30 meters and exercise with a rubber shock absorber. It is set that authenticity of distinctions from influence the static and dynamic loading is in ten year age, divergence is 117% at implementation of dynamic exercises. It is set that the index of index of tension after the physical loadings is marked reliable changes the degree of tension of mechanisms of adjusting of cardiac activity. During renewal this index gradually goes back to the basic data and below. State information is got нейрогуморальных mechanisms of regulative cardiac activity.