Classic massage (CM) treatment based on petrissage. It applies: 1 minute of mild effleurage, 5 minutes of deep effleurage with the thumbs, 5 minutes of firm kneading and 1 minute of tapotement (20 minutes in total). This procedure was repeated for each muscle group.

Sham massage (SM). 20 minutes in total soft effleurage was performed. This procedure was repeated for each muscle group.

It involves applying the classic massage techniques: effleurage (gliding or sliding movement over the skin with a smooth continuous motion following the direction of the muscle fibers of the superficial muscles in a distal to proximal direction); petrissage (lifting, wringing, or squeezing of soft tissues in a kneading motion, or pressing or rolling of the tissues under or between the hands); tapotement (various parts of the hand striking the tissues at a fairly rapid rate). The general objective is to improve extensibility of muscle, tendon, fascia, joint capsule, and ligamentous structures.

It is a specific test that is performed in supine position. The subject flexes the hip until it reaches 90º, while keeping the knee flexed. Subsequently, he takes the ankle and takes the knee to an extension position passively. In this position, one takes measure of the degrees that are lacking until the complete extension. During the test, it should be ensured that there are no compensations.

It is performed with a knee and assesses the shortening of the hamstring muscles. The test is performed in supine position, and consists of flexing the hip in a slow and passive way until it reaches a flexion that the tightness or pain that the participant feels does not let go more. It should be noted that there is no knee flexion or any other type of compensation such as tilting of the pelvis. For the quantification we use a universal goniometer.