The experimental group (EG) after taking initial measurements and signing their informed consent will be subjected to an 8-week intervention plan with 2 sessions per week where they will receive 1 MTOH and 1 Foam roller on discontinuous days. MTOH consists of first evaluating the structures that have restrictions, whether soft tissues or joints, to later be treated with a specific manual technique. For this, evaluation methods based on Kaltenborn are used when it comes to joints and Pilat when focusing on soft tissues. Interventions will not exceed 20 minutes per subject. For the foam roller, subjects will perform slides on the instrument using their body weight on the following muscles: quadriceps, hamstrings, gastrocnemius, and tensor fascia lata, for 60 seconds with 3 repetitions for each. Each repetition will have a rest period of 30 seconds, this will be done on both lower limbs.

After taking measurements, they will perform 2 foam roller sessions per week following the same indications expressed in the experimental group.

Blind randomized controlled clinical trial, where a total of 87 people, men and women, of legal age, university athletes of collective disciplines will be evaluated. The experimental group will receive foam roller therapy and manual therapy guided by findings (n = 44) for 8 weeks.

The sit and reach or Wells test is a test commonly used to measure the flexibility of the hamstring muscles and the posterior muscles in general (Mayorga-Vega et al., 2014). This test will be carried out following the guidelines of the American College of Sports Medicine (American College of Sport Medicine [ACSM], 2000). This test consists of placing the person evaluated sitting on the floor in front of a box with their feet resting on it without any type of footwear, keeping their knees fully extended, on the box there is a plate with a tape measure on which the person evaluated must place their hands, later they will perform a maximum trunk flexion trying to cover the greatest possible distance with their upper limbs without altering the rest of the position, if the person cannot reach the plate, the missing distance will be measured to be able to contact it and it will be presented as a negative value.

The goniometer pro application available for iphone will be used. This tool has been previously tested and validated in the Latino population (Barboza et al., 2020). For this, the mobile device will be located with a system of straps that will ensure the position of the equipment on the segment to generate the displacement, once the individual is located in the starting position, the initial point will be selected in the application to then carry out the movement. The mobile device will then measure the displacement and give a measurement in degrees (°) that will be recorded.

The Optogate will be used, following the CMJ jump test, in which the subject stands in the middle of the instrument's optical led strips, adopts a position of knee and hip flexion where the knee joint forms an angle of 90 °, to ensure that it will be done in this way, it will be measured with a manual goniometer and a rope will be placed to give the subject a stimulus when he is in the correct position. In addition, you must place your hands on the waist and execute the jump in a single movement, fluid and without interruptions, before taking the measurements the subject will be allowed to become familiar with the test, in the first session. On measurement days, 3 jumps will be allowed and the one with the highest score will be considered valid.