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Completed

NCT Number: NCT06562322

Acute Effect of Photobiomodulation Therapy on Muscle Performance in Female Futsal Players

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.

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Key information

Conditions

Muscle Performance Photobiomodulation Therapy

Age range

18 year–35 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Universidade Norte do Paraná

Londrina, Paraná, 86.041-140, Brazil

About this study

Background: 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 is to investigate the dose-response effect of PBMT on muscle performance in female futsal players. Methods: In a crossover design, fifteen female futsal athletes (age: 18-30 years) will be randomized to receive 1 of 4 PBMT conditions (placebo, 300, 900, and 1260 joules [J]) on four occasions, separated by a 2-wk washout period. PBMT treatments will be applied on the quadriceps muscle of both legs using a device containing 200 light-emitting diodes (LEDs), immediately before the following tests (dependent variables): countermovement jump (CMJ) (i.e., flight time as indicator of muscle power), maximum voluntary isometric contraction (MVIC) for the leg extension exercise (i.e., muscle strength), and 3 sets of repetitions-to-failure (i.e., local muscular endurance) for the 45º leg press exercise, with recording of rating of perceived exertion (RPE) after each set. The fatigue index will be determined by the number of repetitions between sets 1 and 3. Statistical analyses will be performe using IBM SPSS Statistics for Windows (version 24.0; IBM Corp., Armonk, NY). Data will be tested for normality and homogeneity using the Shapiro-Wilk's and Levene's tests, respectively. One-way ANOVA tests will be performed to evaluate the differences in the fatigue index, flight time, and peak and mean torque between the treatment conditions (placebo, 300, 900, and 1260 J). Changes over time and between treatment conditions in maximum number of repetitions and RPE will be analyzed with two-way repeated measures ANOVA. Violation of sphericity was corrected using the Greenhouse-Geisser method. When significant differences will be confirmed with the ANOVA, multiple comparison testing will be performed using the Bonferroni post hoc correction to identify these differences. Values will be expressed as mean (standard deviation and 95% confidence interval). The significance level was set at p < 0.05.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Age between 18 and 35 years
  • Playing futsal regularly for more than 1 year.

Exclusion criteria

  • Use of any ergogenic or anabolic supplement within 6 months prior to the start of the study,
  • Take any medication that may affect the ability to perform the physical tests,
  • Have any physical limitation (e.g. joint or muscle injury) that may affect the ability to perform the physical test,
  • Be engaged in a restricted diet program (e.g. weight loss diet),
  • Have any skin sensitivity or diseases (e.g. erysipelas, eczema, dermatitis, psoriasis and urticaria) in the irradiated area that may be aggravated by PBMT.

Treatment and study plan

PLACEBO

Device

Participants will be received placebo PBMT on the quadriceps muscle of both legs, immediately before physical tests, using a device containing 200 LEDs (100 red and 100 infrared)

300 J

Device

Participants will be received PBMT at 300 J on the quadriceps muscle of both legs, immediately before physical tests, using a device containing 200 LEDs (100 red and 100 infrared)

600 J

Device

Participants will be received PBMT at 600 J on the quadriceps muscle of both legs, immediately before physical tests, using a device containing 200 LEDs (100 red and 100 infrared)

1260 J

Device

Participants will be received PBMT at 1260 J on the quadriceps muscle of both legs, immediately before physical tests, using a device containing 200 LEDs (100 red and 100 infrared)

Primary outcomes

  1. Repetitions-to-failure

    Time frame: 10 minutes

    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), and the maximum number of repetitions in each set will be recorded.

  2. Fatigue index (FI)

    Time frame: 10 minutes

    The fatigue index (FI) will be determined by the equation: [(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.

  3. Rating of perceive exterion (RPE)

    Time frame: 10 minutes

    Rating of perceived exertion (RPE) will be recorded immediately after completion of each set using the OMNI-RES scale. 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.

  4. Countermovement vertical jump (CMJ)

    Time frame: 10 minutes

    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.

  5. Maximum voluntary isometric contraction (MVIC)

    Time frame: 10 minutes

    The MVIC test for the leg extension exercise (bilateral) will be performed using an isometric dynamometer (CEFISE Biotechnology, São Carlos, Brazil). 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.

Sponsors and collaborators

Lead sponsor

Universidade Norte do Paraná

Other

Registry information

Official study title

Acute Dose-response Effect of Photobiomodulation Therapy on Muscle Performance in Female Futsal Players: a Randomized, Double-blind, Placebo-controlled, Crossover Study

Important dates

Study start
2024
Primary completion
2024
Study completion
2024
First posted
Aug 20, 2024
Registry last updated
Jan 9, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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