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Completed

NCT Number: NCT01391195

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

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.

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Key information

Conditions

Healthy

Age range

18 year–28 year

Sex eligibility

Female

Study type

Interventional

Phase

Phase 1

Primary location

Universidade Federal de Sao Carlos

São Carlos, São Paulo, 13565-905, Brazil

About this study

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.

Who can participate

Healthy volunteers accepted: Yes

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

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

Treatment and study plan

Phototherapy by low level laser therapy

Device

Phototherapy by low level laser therapy during 9 weeks

Other names: Laser, Laser therapy, Low level laser therapy

Primary outcomes

  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 outcomes

  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

Sponsors and collaborators

Lead sponsor

Universidade Federal de Sao Carlos

Other

Collaborators

  • Conselho Nacional de Desenvolvimento Científico e Tecnológico

Registry information

Important dates

Study start
2006
Primary completion
2007
Study completion
2007
First posted
Jul 11, 2011
Registry last updated
Jul 13, 2011

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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