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

Phase 1

Completed

• Conditions: Healthy
• Interventions: Device: Phototherapy by low level laser therapy

• Registration Number: NCT01391195
• Lead Sponsor: 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.

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 Timeline

• Status Verified: 2005-12
• Study Start: 2006-01
• Primary Completion: 2007-04
• Study Completion: 2007-10
• Study First Submitted: 2011-07-07
• Study First Submitted QC: 2011-07-08
• Study First Posted: 2011-07-11
• Last Update Submitted: 2011-07-12
• Last Update Posted: 2011-07-13

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Female
• Target Recruitment: 45

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

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Laser therapy and aerobic capacity	Phototherapy by low level laser therapy	Effects of low level laser therapy on aerobic capacity of young women submitted to endurance training

Primary Outcome Measures

Name	Time	Method
Fatigue Index of knee extensor muscles	nine weeks	Fatigue Index of knee extensor muscles assessed in isokinetic dynamometry.
VO2peak	nine weeks	VO2peak quantified by a gas analyzer.
Ventilatory threshold	nine weeks	Ventilatory threshold quantified by a gas analyzer.
VO2max	nine weeks	VO2max quantified by a gas analyzer.
Maximum load of effort on cycle ergometer (Balke's protocol).	nine weeks	Maximum load of effort on cycle ergometer quantified in Watts.

Secondary Outcome Measures

Name	Time	Method
Borg scale	nine weeks	Subjective effort perception assessed by Borg scale
Heart rate	nine weeks	Heart Rate assessed by cardiac frequency meter
Total work of knee extensor muscles	nine weeks	Total work of knee extensor muscles assessed in isokinetic dynamometry
Peak torque of knee extensor muscles	nine weeks	Peak torque of knee extensor muscles assessed in isokinetic dynamometry

Trial Locations

Locations (1)

Universidade Federal de Sao Carlos; 🇧🇷 São Carlos, São Paulo, Brazil