This research aims at improving the lesson/training form, so that the instruction process becomes more efficient. The improvement consists of turning the lesson “classical” form into the “clepsydra” form, according to the following scheme: global effective - reduced effective - 1:1 effective - reduced effective - global effective. The “clepsydra” lesson/training structuring will induce an optimization of the training process and, implicitly, of the performances. The “clepsydra” can include all the lesson themes, respectively all the training components or, selectively, a certain theme (certain themes). We can notice the adversity degree differentiations between both the “clepsydra” halves and their sequences. Thus, if the first half has all the adversity degrees, the second one has semi-active and active adversity degrees, with the active adversity compulsoriness in the “clepsydra” last sequence. The adversity degree is related to the previously mentioned aspects and to the instruction level. Progress rate within the “clepsydra” structures is significantly better (15 to 30%).