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NCT Number: NCT02715050

Phototherapy Applied in Association With Muscular Training

The effects of phototherapy has been widely studied by some research groups. The investigators know that there are positive results with light application to improve muscle performance and delay fatigue. However, there are few studies showing its´ effects on muscular training. Therefore, the aim of this study was to assess the effects of phototherapy applied at different times during 12 weeks of strength training. For such, 48 volunteers, healthy male, from 18 to 35 years old were recruited to perform a strength training protocol for the anterior muscle of the thigh development. Volunteers performed the training protocol three times a week for 12 weeks. There were assessed isometric peak torque in isokinetic dynamometer, concentric peak torque, 1-repetition maximum test in the leg extension and leg press machines and bilateral thigh perimetry.

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Key information

Conditions

Muscle Adaptation

Age range

18 year–35 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

Universidade Nove de Julho

São Paulo, 01504-001, Brazil

About this study

This is a clinical, randomized, controlled placebo and double-blind study. Forty-eight participants performed muscular training protocol. Subjects practiced a protocol training with 60% of the load followed by 80% of the load, measured through 1-repetition maximum test, in all sessions of the training protocol. The training protocol consisted in performing 3 sets of 7 repetitions with 60% of 1-RM, and 4 set of 7 repetitions with 80% of 1-RM. This protocol was performed in every sessions, three times a week, employing leg press and leg extension machines.

Phototherapy, active or placebo, were applied in 6 different points of anterior muscle of the thigh before and after each training session. Only one investigator, that did not participate in any phase of the assessments and trainings sessions, knew about what program is active or placebo in phototherapy device. Randomisation carried out by a simple drawing of lots (A, B, C, or D) in the first visit. The phototherapy unit emitted the same sound regardless of the program used, active or placebo. Either strength training lasted 12 weeks and assessments were performed at baseline, 4, 8 and 12 weeks. There were evaluated maximal voluntary contraction (MVC), concentric torque, bilateral thigh perimetry and 1-repetition maximum test (1-RM).

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • healthy individuals,
  • active, that performed less than two exercise sessions per week
  • when they presented musculoskeletal injury to the hips or knees in the previous 2 months,
  • used pharmacological agents or nutritional supplements regularly, and
  • Subjects that did not attend a minimum rate of 80% of all strength training sessions
  • Suffered musculoskeletal injury during the ongoing of the study were also excluded.

Treatment and study plan

Active or Placebo Phototherapy (MR4)

Device

Other names: MR4 device - device that combines super-pulsed lasers, and red and infrared LEDs (Multi Radiance Medical, Solon, OH, USA)

Primary outcomes

  1. Change from baseline Maximum voluntary contraction in the isokinetic dynamometer (MVC) at 12 weeks

    Time frame: 12 weeks

    Functional performance measure - performed in baseline, 4 weeks, 8 weeks and 12 weeks after the beginning of the muscular training

  2. Change from baseline Concentric Torque at 12 weeks

    Time frame: 12 weeks

    Functional performance measure - performed in baseline, 4 weeks, 8 weeks and 12 weeks after the beginning of the muscular training

Secondary outcomes

  1. 1-RM test

    Time frame: 12 weeks

    Functional performance measure - performed in baseline, 4 weeks, 8 weeks and 12 weeks after the beginning of the muscular training. This test estimated the load of the exercises.

Other outcomes

  1. Thigh perimetry

    Time frame: 12 weeks

    Muscle mass measure - performed in baseline, 4 weeks, 8 weeks and 12 weeks after the beginning of the muscular training.

Sponsors and collaborators

Lead sponsor

University of Nove de Julho

Other

Collaborators

  • Fundação de Amparo à Pesquisa do Estado de São Paulo

Registry information

Official study title

Phototherapy Applied in Association With Muscular Training: Evaluation of Different Moments of Applications

Important dates

Study start
2016
Primary completion
2016
Study completion
2016
First posted
Mar 22, 2016
Registry last updated
Oct 20, 2016

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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