Effect of Low-level Laser Therapy on Exercise-induced Muscle Damage
NCT ID: NCT02493556
Last Updated: 2015-10-15
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
12 participants
INTERVENTIONAL
2015-06-30
2015-09-30
Brief Summary
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Objectives: To describe the effects of LLLT on pain, strength and muscular inflammation after plyometric exercise.
Methods: A randomized, double-blinded, placebo-controlled trial with participation of 20 male healthy volunteers will be performed. Healthy and physically active individuals, aged between 18 and 35 years, with no history of injury on the lower limbs or contra-indications to maximal exercise performance will be included. A protocol of 10 series with 10 repetitions of the countermovement jump will be used to induce muscle damage at the lower limbs. Immediately before or after the exercise protocol, LLLT will be applied on one lower limb, while the other will receive placebo treatment. Phototherapy will be applied with an equipment of 810nm and a cluster with 5 diodes on 8 different points of the knee extensor muscle, totalizing a dosage of 240J. The placebo treatment will be held on the same way, but the equipment will be turned off. The volunteers will be evaluated at baseline (before the exercise protocol) and at follow-up of 24, 48 and 72 hours. The following outcomes will be evaluated: knee extensors isometric peak torque by Isokinetic Dynamometer, pain by Visual Analogue Scale and muscular tissue echo intensity by Ultrasonography.
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
DOUBLE
Study Groups
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LLLT before muscle damage
Low Level Laser Therapy (LLLT) will be applied before the exercise protocol on one lower limb, while the other will receive placebo treatment. Phototherapy will be applied with an equipment of 810nm and a cluster with five diodes on eight different points of quadriceps muscle, totalizing a dosage of 240J.
LLLT before muscle damage
Placebo LLLT before muscle damage
Placebo LLLT will be applied before the exercise protocol on one lower limb, while the other will receive real treatment. Placebo treatment will also be applied on eight different points of quadriceps muscle, but the equipment will be turned off.
Placebo LLLT before muscle damage
LLLT after muscle damage
Low Level Laser Therapy (LLLT) will be applied after the exercise protocol on one lower limb, while the other will receive placebo treatment. Phototherapy will be applied with an equipment of 810nm and a cluster with five diodes on eight different points of quadriceps muscle, totalizing a dosage of 240J.
LLLT after muscle damage
Placebo LLLT after muscle damage
Placebo LLLT will be applied after the exercise protocol on one lower limb, while the other will receive real treatment. Placebo treatment will also be applied on eight different points of quadriceps muscle, but the equipment will be turned off.
Placebo LLLT after muscle damage
Interventions
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LLLT before muscle damage
Placebo LLLT before muscle damage
LLLT after muscle damage
Placebo LLLT after muscle damage
Eligibility Criteria
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Inclusion Criteria
* Sedentary or physically active individuals who exercise up to 3 times per week.
Exclusion Criteria
* Individuals who participate in strength training for the lower limbs;
* Individuals with lower or upper limb injuries;
* Individuals with contra-indications to maximal exercise performance (due to neurological, cardiovascular or respiratory conditions);
* Individuals who show difficulties to understand the study protocol.
18 Years
35 Years
MALE
Yes
Sponsors
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Federal University of Health Science of Porto Alegre
OTHER
Responsible Party
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Bruno Manfredini Baroni
Phd
Principal Investigators
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Bruno Baroni, phD
Role: STUDY_DIRECTOR
Federal University of Health Science of Porto Alegre
Locations
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Federal University of Health Science of Porto Alegre
Porto Alegre, Rio Grande do Sul, Brazil
Countries
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Other Identifiers
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38076514.0.0000.5345
Identifier Type: -
Identifier Source: org_study_id
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