Photobiomodulation On Muscle Recovery In Professional Soccer Players
Photobiomodulation On Muscle Recovery In Professional Soccer Players
Background: Photobiomodulation with low-level laser therapy (LLLT) has been widely used in
 clinical practice for diverse purposes, such as modulation of the inflammatory process,
 acceleration of the tissue repair process, pain relief and the enhancement of post-exercise
 recovery. Studies have demonstrated a beneficial interaction between photobiomodulation and
 the production of creatine kinase, with a reduction in the release of this marker of muscle
 damage when laser and/or LEDs is administered prior to high-intensity physical activity. The
 aim of the proposed study is to determine the influence of pre-exercise phototherapy on
 post-exercise muscle recovery.

 Methods: A randomized, cross-over, sham-controlled, double-blind, clinical trial is proposed.
 The participants will be healthy professional soccer players aged 15 to 20 years from the
 same team with a body mass index within the ideal range (20 to 25 kg/m2) and no history of
 lower limb musculoskeletal injuries or surgery or back surgery in the previous six months.
 The athletes will be allocated to two groups based on the previously calculated sample size
 and will be blinded to allocation. Creatine kinase will be measured and the subjective
 perception of fatigue will be determined for each participant. The volunteers will then be
 randomly allocated to Group A, which will receive active phototherapy, and Group B, which
 will receive sham phototherapy. The athletes will undergo reevaluations immediately after as
 well as 48 hours after a football match. The data will be submitted to statistical analysis
 and the level of significance will be set to 5%.
Inclusion Criteria:

 -  Healthy professional soccer players aged 15 to 20 years from the same team with a body
 mass index in the ideal range (20 to 25 kg/m2) will be included in the study.

 Exclusion Criteria:

 -  A history of musculoskeletal injuries and/or surgeries in the lower limbs or back
 surgery in the previous six months