After randomization, the control group will receive conventional physiotherapy, including manual therapy and therapeutic exercise for ACL rehabilitation. The first experimental group will undergo percutaneous electrical nerve stimulation of the sciatic nerve, while the second experimental group will receive a placebo stimulation. Both interventions aim to improve isometric strength, muscle activation, joint range of motion, and thigh circumference, as well as reduce pain and intra-articular effusion. The procedure involves needle insertion into the sciatic nerve epineurium, placement of a surface electrode on the hamstrings, and connection to an electrostimulator.