Acute Effect of Photobiomodulation Therapy on Muscle Performance in Female Futsal Players
NCT Number: NCT06562322
Status: COMPLETED
Study Type: INTERVENTIONAL
Phases: NA
Conditions: Muscle Performance|Photobiomodulation Therapy
Interventions: DEVICE: Placebo|DEVICE: 300 J|DEVICE: 600 J|DEVICE: 1260 J
Sponsor: Universidade Norte do Paraná
Sex: FEMALE
Age: ADULT
Enrollment: 15
Study Design: Allocation: RANDOMIZED|Intervention Model: CROSSOVER|Masking: DOUBLE (PARTICIPANT, OUTCOMES_ASSESSOR)|Primary Purpose: BASIC_SCIENCE
Start Date: 2024-02-15
Completion Date: 2024-03-18
Locations: Universidade Norte do Paraná, Londrina, Paraná, 86.041-140, Brazil

Summary:
Photobiomodulation therapy (PBMT) has recently been indicated as a potential therapeutic strategy in diverse health and sports contexts. However, its efficacy on muscle performance in female futsal players remains unknown. The purpose of this study was to investigate the dose-response effect of PBMT on muscle performance in female futsal players.

Primary Outcome Measures: Repetitions-to-failure, The repetitions-to-failure test in the 45º leg press exercise consists of 3 sets at 70% of 1RM, with a 60-s rest interval between each set. Participants will perform as many repetitions as possible until momentary failure (i.e., when the participant is unable to complete the concentric portion of their current repetition across the full range of motion despite using maximal effort) \[1\], and the maximum number of repetitions in each set will be recorded., 10 minutes|Fatigue index (FI), The fatigue index (FI) will be determined by the equation proposed by \[2\]: \[(REPS3 - REPS1)/REPS1\]\*100, where: REPS3 = number of repetitions in set 3, multiplied by the load lifted, and REPS1 = number of repetitions in set 1, multiplied by the load lifted. The higher the FI value (%), the higher the level of muscle fatigue., 10 minutes|Rating of perceive exterion (RPE), Rating of perceived exertion (RPE) will be recorded immediately after completion of each set using the OMNI-RES scale \[3\]. The participants will be instructed to report the perceived exertion value by indicating a number on the OMNI-RES scale (0 for ''no effort'' and 10 for ''maximal effort'') that best represented their momentary exertion., 10 minutes|Countermovement vertical jump (CMJ), The CMJ test will be performed on a force platform (BIOMEC400-412, EMG System to Brazil Ltda, São Paulo, Brazil) to assess the flight time. Participants will perform three CMJs, interspersed with 1 min of rest, and the highest flight time will be used as an indicator of muscle power. The test will began with the participant standing, knees extended, and hands fixed on the iliac crest region (hips). The participant then will flexed their legs at an angle of approximately 90º and then quickly extended their legs to maximize the height of the jump. Hands will be kepted on hips throughout the jump., 10 minutes|Maximum voluntary isometric contraction (MVIC), The MVIC test for the leg extension exercise (bilateral) will be performed using an isometric dynamometer (CEFISE Biotechnology, São Carlos, Brazil), according to the protocol proposed by \[4\]. Briefly, participants will perform three MVICs at 120º of knee flexion (180º = full extension) lasting 5 s, interspersed with 5 s of rest. Participants will be instructed and verbally encouraged to exert maximum force during all attempts. The highest value obtained for peak and mean torque of the three MVICs will be used for the analysis., 10 minutes