Element wich discribes efects of activ relaksation is not only intensivity of taring efford, but level end dept process of taring. In those changes certen role is plade by complex action increased insensitivity and level and dept of tiredness. Dynamik effect of changes of renumber active relaxation with exception of those facts describes them interaction with individual accumulation of tiredness during physical exercise. Important is possibility of transformation regime of work from increased tiredness in to opposite regime - together increased , during repeated actions, ability to work.