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

Purpose

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	Intervention	Phase
Healthy	Device: Phototherapy by low level laser therapy	Phase 1

Study Type:	Interventional
Study Design:	Allocation: Randomized Endpoint Classification: Efficacy Study Intervention Model: Parallel Assignment Masking: Open Label Primary Purpose: Treatment
Official Title:	Effects of Low Level Laser Therapy (808nm) on Muscle Performance of Young Women Submitted to Physical Training

Resource links provided by NLM:

MedlinePlus related topics: Fatigue

U.S. FDA Resources

Further study details as provided by Universidade Federal de Sao Carlos:

Primary Outcome Measures:

Fatigue Index of knee extensor muscles [ Time Frame: nine weeks ] [ Designated as safety issue: No ]
Fatigue Index of knee extensor muscles assessed in isokinetic dynamometry.
Ventilatory threshold [ Time Frame: nine weeks ] [ Designated as safety issue: No ]
Ventilatory threshold quantified by a gas analyzer.
VO2max [ Time Frame: nine weeks ] [ Designated as safety issue: No ]
VO2max quantified by a gas analyzer.
VO2peak [ Time Frame: nine weeks ] [ Designated as safety issue: No ]
VO2peak quantified by a gas analyzer.
Maximum load of effort on cycle ergometer (Balke's protocol). [ Time Frame: nine weeks ] [ Designated as safety issue: No ]
Maximum load of effort on cycle ergometer quantified in Watts.

Secondary Outcome Measures:

Total work of knee extensor muscles [ Time Frame: nine weeks ] [ Designated as safety issue: No ]
Total work of knee extensor muscles assessed in isokinetic dynamometry
Peak torque of knee extensor muscles [ Time Frame: nine weeks ] [ Designated as safety issue: No ]
Peak torque of knee extensor muscles assessed in isokinetic dynamometry
Borg scale [ Time Frame: nine weeks ] [ Designated as safety issue: No ]
Subjective effort perception assessed by Borg scale
Heart rate [ Time Frame: nine weeks ] [ Designated as safety issue: No ]
Heart Rate assessed by cardiac frequency meter

Enrollment:	45
Study Start Date:	January 2006
Study Completion Date:	October 2007
Primary Completion Date:	April 2007 (Final data collection date for primary outcome measure)

Arms	Assigned Interventions
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

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.

Eligibility

Ages Eligible for Study:	18 Years to 28 Years
Genders 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

Contacts and Locations

Please refer to this study by its ClinicalTrials.gov identifier: 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

More Information

Publications:

Ferraresi C, de Brito Oliveira T, de Oliveira Zafalon L, de Menezes Reiff RB, Baldissera V, de Andrade Perez SE, Matheucci Júnior E, Parizotto NA. Effects of low level laser therapy (808 nm) on physical strength training in humans. Lasers Med Sci. 2011 May;26(3):349-58. Epub 2010 Nov 18.

Leal Junior EC, Lopes-Martins RA, de Almeida P, Ramos L, Iversen VV, Bjordal JM. Effect of low-level laser therapy (GaAs 904 nm) in skeletal muscle fatigue and biochemical markers of muscle damage in rats. Eur J Appl Physiol. 2010 Apr;108(6):1083-8. Epub 2009 Dec 19.

Lopes-Martins RA, Marcos RL, Leonardo PS, Prianti AC Jr, Muscará MN, Aimbire F, Frigo L, Iversen VV, Bjordal JM. Effect of low-level laser (Ga-Al-As 655 nm) on skeletal muscle fatigue induced by electrical stimulation in rats. J Appl Physiol. 2006 Jul;101(1):283-8. Epub 2006 Apr 20.

Baroni BM, Leal Junior EC, De Marchi T, Lopes AL, Salvador M, Vaz MA. Low level laser therapy before eccentric exercise reduces muscle damage markers in humans. Eur J Appl Physiol. 2010 Nov;110(4):789-96. Epub 2010 Jul 3.

Baroni BM, Leal Junior EC, Geremia JM, Diefenthaeler F, Vaz MA. Effect of light-emitting diodes therapy (LEDT) on knee extensor muscle fatigue. Photomed Laser Surg. 2010 Oct;28(5):653-8. Epub 2010 Jul 13.

Leal Junior EC, Lopes-Martins RA, Baroni BM, De Marchi T, Taufer D, Manfro DS, Rech M, Danna V, Grosselli D, Generosi RA, Marcos RL, Ramos L, Bjordal JM. Effect of 830 nm low-level laser therapy applied before high-intensity exercises on skeletal muscle recovery in athletes. Lasers Med Sci. 2009 Nov;24(6):857-63. Epub 2008 Dec 5.

Leal Junior EC, Lopes-Martins RA, Vanin AA, Baroni BM, Grosselli D, De Marchi T, Iversen VV, Bjordal JM. Effect of 830 nm low-level laser therapy in exercise-induced skeletal muscle fatigue in humans. Lasers Med Sci. 2009 May;24(3):425-31. Epub 2008 Jul 23.

Leal Junior EC, Lopes-Martins RA, Dalan F, Ferrari M, Sbabo FM, Generosi RA, Baroni BM, Penna SC, Iversen VV, Bjordal JM. Effect of 655-nm low-level laser therapy on exercise-induced skeletal muscle fatigue in humans. Photomed Laser Surg. 2008 Oct;26(5):419-24.

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
Study First Received:	July 7, 2011
Last Updated:	July 12, 2011
Health Authority:	Brazil: National Committee of Ethics in Research

Keywords provided by Universidade Federal de Sao Carlos:

low level laser therapy
muscle performance
fatigue index
endurance training

ventilatory threshold
VO2Max
VO2Peak

ClinicalTrials.gov processed this record on May 22, 2013