Echo-guided Percutaneous Electrical Nerve Stimulation of the Femoral Nerve

The protocol applied in this study will consist of: 10 stimulations of 10 seconds at 10Hz with a rest of 10 seconds between one stimulation and the next one. The intensity of the current (mA) will be adapted to each of the subjects until the greatest possible muscle contraction is achieved without reaching the painful threshold.

For the subjects in the control group, the same process shall be carried out without increasing the intensity of the current. It shall be explained to the subjects that the current will reach a non-perceptible stimulus.