| Sumario: | Background: The fascia involves all tissues and organs of the body, an important element in the organization of the transmission of force between body segments, and any dysfunction or alteration can generate hypomobility, altering the biomechanics of movement and restricting muscle strength. Among the myofascial release techniques, there is self-myofascial release, a technique that makes use of a foam roller, which the subject is the one who actively slides from side to side over the foam roller. Objective: To evaluate the influence of high myofascial release through the foam roller on the power and agility of the hamstring and gastrocnemius muscles. Methods: This is a randomized controlled clinical study. Thirty healthy participants were invited, who underwent a training period for four weeks, with a frequency of three days a week, divided into three distinct groups: active stretching group (SG) composed of 10 subjects, who performed active stretching of the hamstring and gastrocnemius muscles; foam roller group (FR) composed of 10 subjects who performed self-myofascial release through the foam roller; and control group (CG) formed by 10 individuals who received no intervention. The participants initially underwent an anthropometric assessment (weight, height and body mass index), performed the Illinois Test for agility, which presents an interesting alternative for the evaluation and control of this motor ability, and the Vertical Jump Test that has been highlighted in the literature as the main method of measuring explosive strength of lower limbs. Results: Thirty-five participants were recruited, of which thirty met the inclusion criteria. In the development of the study, there were four dropouts, totaling a final sample of twenty-six subjects. After 4 weeks of intervention, no significant data related to vertical jump, which assessed muscle power, was observed, however, through the Illinois test, there was gains related to the agility of subjects in the FR when compared to the others. Conclusion: It can be concluded with the data from the present study, that the use of foam roller, as a strategy for self-myofascial release, proved to be efficient for the agility of the participants, however it did not present data as significant when related to muscle power.
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