The pressure response in dynamic resistance exercise has been studied traditionally using the leg press exercise as a model . During a leg press set, there is an excessive pressure response during the first repetition . This is the consequence of mainly four factors. Firstly, the feet elevation from the resting to the exercise position . Secondly, the isometric contraction during the position adjustment before the beginning of the exercise . Thirdly, the effort performed to overcome the absence of elastic energy stored in the muscles . Fourthly, an excessive intrathoracic pressure that is the consequence of all the previous issues . During the next few repetitions, there is a v-shape pressure response. This occurs simultaneously with an enhanced use of the elastic energy, which is stored in the muscles in an absence of fatigue . The v-shape pressure response is a hemodynamic advantage, since some repetitions can be performed without an elevation of the blood pressure . Once the fatigue begins and increases, there is a progressive increment in the systemic pressure response. This originates reflexively in the active muscles due to the mismatch between blood flow and metabolic demands . There is also an augmenting intrathoracic pressure due to the Valsalva maneuver . The junction between both causes leads to a peak pressure response, which occurs at the last repetition, before the occurrence of muscular failure .