Participants assigned to this group will received two sessions (once per week) of ultrasound guided Percutaneous Peripheral Nerve Stimulation targeting the femoral nerve. We will apply a biphasic compensated electrical current at a frequency of 10 Hz, a pulse width of 240 µs and intensity allowed over a pain-free motor threshold (muscle contraction). Each participant will receive 10 repetitions of 10 seconds each one with 10 seconds rest- period between series (total treatment session 1.40 min).

After that participants will walk during 3 minutes.

Participants in the control group will walk during 5 minutes, without receiving any intervention

Participants assigned to this group will received two sessions (once per week) of ultrasound guided Percutaneous Peripheral Nerve Stimulation targeting the femoral nerve.

The jump will start in an upright position with participants hands in their waists. They will perform a vertical jump after a fast down countermovement. During the knees and hips flexion, the trunk will remain the most upright as possible. The jump is measured using a Chronopump-Boscosystem DIN-A2 contact platform obtaining a jump reliable and valid height in centimeters

The Speed4Lift device will be used. Squats will be performed using a 20kg olympic bar with two 20kg discs in each side. Participants will place the bar over their shoulders in a 90º triple-flexion position. The measurements will be performed during the concentric contraction phase of the squat