Acute Dose-response Effect of Photobiomodulation Therapy on Muscle Performance in Female Futsal Players: a Randomized, Double-blind, Placebo-controlled, Crossover Study
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 15
- 试验地点
- 1
- 主要终点
- Repetitions-to-failure
研究概览
简要总结
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.
详细描述
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.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Basic Science
- 盲法
- Double (Participant, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 35 Years（Adult）
- 性别
- Female
- 接受健康志愿者
- 是
入选标准
- •Age between 18 and 35 years
- •Playing futsal regularly for more than 1 year.
排除标准
- •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.
研究组 & 干预措施
placebo PBMT
Participants will be received placebo PBMT immediately before physical tests.
干预措施: Placebo (Device)
300 J PBMT
Participants will be received PBMT at 300 J immediately before physical tests.
干预措施: 300 J (Device)
600 J PBMT
Participants will be received PBMT at 600 J immediately before physical tests.
干预措施: 600 J (Device)
1260 J PBMT
Participants will be received PBMT at 1260 J immediately before physical tests.
干预措施: 1260 J (Device)
结局指标
主要结局
Repetitions-to-failure
时间窗: 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.
Fatigue index (FI)
时间窗: 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.
Rating of perceive exterion (RPE)
时间窗: 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.
Countermovement vertical jump (CMJ)
时间窗: 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.
Maximum voluntary isometric contraction (MVIC)
时间窗: 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.
次要结局
未报告次要终点
研究者
Andreo Fernando Aguiar
Principal investigator
Universidade Norte do Paraná