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Effects of Low Level Laser Therapy (808nm) on Muscle Performance of Young Women Submitted to Physical Training

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ClinicalTrials.gov Identifier: NCT01391195
Recruitment Status : Completed
First Posted : July 11, 2011
Last Update Posted : July 13, 2011
Sponsor:
Collaborator:
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Information provided by:
Universidade Federal de Sao Carlos

Brief Summary:
The study hypothesis is an increase in muscle performance and a higher aerobic adaptation of young women submitted to chronic endurance training program associated to low level laser therapy when compared to chronic aerobic training alone.

Condition or disease Intervention/treatment Phase
Healthy Device: Phototherapy by low level laser therapy Phase 1

Detailed Description:
The study assessed women muscle performance in isokinetic dynamometry, ventilatory parameters such as ventilatory threshold, VO2Peak, VO2Max, Ventilation. Maximal load in cycle ergometer test (Balke's protocol), Borg Scale and Heart rate were assessed too.

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 45 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Effects of Low Level Laser Therapy (808nm) on Muscle Performance of Young Women Submitted to Physical Training
Study Start Date : January 2006
Primary Completion Date : April 2007
Study Completion Date : October 2007

Arm Intervention/treatment
Experimental: Laser therapy and aerobic capacity
Effects of low level laser therapy on aerobic capacity of young women submitted to endurance training
Device: Phototherapy by low level laser therapy
Phototherapy by low level laser therapy during 9 weeks
Other Names:
  • Laser
  • Laser therapy
  • Low level laser therapy



Primary Outcome Measures :
  1. Fatigue Index of knee extensor muscles [ Time Frame: nine weeks ]
    Fatigue Index of knee extensor muscles assessed in isokinetic dynamometry.

  2. Ventilatory threshold [ Time Frame: nine weeks ]
    Ventilatory threshold quantified by a gas analyzer.

  3. VO2max [ Time Frame: nine weeks ]
    VO2max quantified by a gas analyzer.

  4. VO2peak [ Time Frame: nine weeks ]
    VO2peak quantified by a gas analyzer.

  5. Maximum load of effort on cycle ergometer (Balke's protocol). [ Time Frame: nine weeks ]
    Maximum load of effort on cycle ergometer quantified in Watts.


Secondary Outcome Measures :
  1. Total work of knee extensor muscles [ Time Frame: nine weeks ]
    Total work of knee extensor muscles assessed in isokinetic dynamometry

  2. Peak torque of knee extensor muscles [ Time Frame: nine weeks ]
    Peak torque of knee extensor muscles assessed in isokinetic dynamometry

  3. Borg scale [ Time Frame: nine weeks ]
    Subjective effort perception assessed by Borg scale

  4. Heart rate [ Time Frame: nine weeks ]
    Heart Rate assessed by cardiac frequency meter



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Ages Eligible for Study:   18 Years to 28 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • healthy young women volunteers
  • women with a beginner or moderately trained pattern of physical activity
  • body Mass Index (BMI) between 18 and 25kg/m2

Exclusion Criteria:

  • previous injury to the femoral quadriceps or hamstrings muscles (within 6 months prior to study)
  • osseous or articular disorder in the lower limbs
  • cardiovascular system disorders or systemic disease

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01391195


Locations
Brazil
Universidade Federal de Sao Carlos
São Carlos, São Paulo, Brazil, 13565-905
Sponsors and Collaborators
Universidade Federal de Sao Carlos
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Investigators
Principal Investigator: Wouber Hérickson B Vieira, PhD Universidade Federal de Sao Carlos
Study Director: Nivaldo A Parizotto, PhD Universidade Federal de Sao Carlos
Principal Investigator: Cleber Ferraresi, Ms Universidade Federal de Sao Carlos

Publications:

Responsible Party: Wouber Hérickson de Brito Vieira, Federal University of São Carlos
ClinicalTrials.gov Identifier: NCT01391195     History of Changes
Other Study ID Numbers: CAAE - 0100.0.135.000-05
First Posted: July 11, 2011    Key Record Dates
Last Update Posted: July 13, 2011
Last Verified: December 2005

Keywords provided by Universidade Federal de Sao Carlos:
low level laser therapy
muscle performance
fatigue index
endurance training
ventilatory threshold
VO2Max
VO2Peak