Different Therapeutical Modalities Associated to Hamstring Flexibility Training

Study Overview
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Brief Summary
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The purpose of this study is to compare the acute effect of the use of different thermal modalities associated to the training of passive flexibility of the hamstring muscles in the amplitude of motion of the knee extension.

Detailed Description
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Context: In the literature there is a disagreement of results and protocols regarding the use of thermal modalities associated with the training of flexibility of the hamstring muscles. Most studies on the subject, used the heat and cryotherapy prior to stretching these. Therefore, the investigators aimed to conduct an experimental study using the therapeutics term concomitant arrangements to passive static stretching these muscles. Methods: Clinical trial randomized crossover, which will a sample of 42 subjects (healthy young men, aged 20 to 30 years). Were divided into 3 groups (Group 1 passive static stretching hamstrings, Group 2 heat + passive static stretching hamstrings and Group 3 cryotherapy + static stretching hamstrings passive) with 14 subjects each. Where the participants will control themselves, since all carry out the three interventions, only at different times. Each action will be performed every 7 days. Individuals will be subjected to active test of the range of motion of knee extension (goniometer) and hamstring muscle strength (dynamometer).

Official Title
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Comparison Between Different Therapeutical Modalities Associated to Hamstring Flexibility Training: Randomized Clinical Trial

Conditions
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Range of Motion, Articular

Intervention / Treatment
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* Procedure: Flexibility training with or without different thermal modalities


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Healthy men with knee extension range less than or equal to 160 degrees. Exclusion Criteria: Have exercised in the last 48 hours before the intervention session; Previous neurological, muscular or articular disease that influences the performance of the training; Anterior lower limb surgery; Presence of painful symptoms or edema in the lower limbs; Hypersensitivity to ice or heat; Raynaud's syndrome; Loss of local thermal sensitivity; Have metallic implants; Use of cardiac pacemaker; Presence of malignant tumor; Arterial diseases; Deep venous thrombosis or phlebitis; Fever and inflammatory processes; Bleeding processes; Osteomyelitis; Epilepsy; Pulmonary and bone tuberculosis; Kidney or urinary tract infection; Cryoglobulinemia;

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 30 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Stretching associated with shortwave heating<br>Applying deep heat through the shortwave equipment for 20 minutes, in coplanar application to the posterior part of the thigh associated with flexibility training of the hamstrings in the last 10 minutes of the session, performed by passive static stretching of the hamstring muscles in 10 repetitions of 30 seconds, with a 10 second pause between each repetition. | Procedure: Flexibility training with or without different thermal modalities<br>* Flexibility training of the hamstring muscles by passive static stretching of the hamstring muscles in 10 30-second repetitions, with a 10-second pause between each repetition associated with or without short-wave heating or cryotherapy<br>|
| Active Comparator: Stretching associated with cryotherapy<br>Cryotherapy application for 20 minutes, applied to the posterior part of the thigh associated with flexibility training of the hamstring muscles in the last 10 minutes of the session, performed by passive static stretching of the hamstring muscles, in 10 repetitions of 30 seconds , with a 10 second pause between each repetition. | Procedure: Flexibility training with or without different thermal modalities<br>* Flexibility training of the hamstring muscles by passive static stretching of the hamstring muscles in 10 30-second repetitions, with a 10-second pause between each repetition associated with or without short-wave heating or cryotherapy<br>|
| Other: Stretching isolated<br>The flexibility training of the hamstring muscles will be by passive static stretching of the hamstring muscles in 10 repetitions of 30-second , with a 10-second pause between each repetition. | Procedure: Flexibility training with or without different thermal modalities<br>* Flexibility training of the hamstring muscles by passive static stretching of the hamstring muscles in 10 30-second repetitions, with a 10-second pause between each repetition associated with or without short-wave heating or cryotherapy<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change of Active Knee Extension Test | Active Knee Extension Test is performed in a standardised procedure and is measured in degrees. | 3 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change of Peak Torque of flexors and knee extensors | Peak torque of flexors and knee extensors is performed in an isokinetic dynamometer (Biodex system III), in a standardised procedure. | 3 weeks | 
| Change of Passive Resistance flexors and knee extensors | Passive Resistance of flexors and knee extensors is performed in an isokinetic dynamometer (Biodex system III), in a standardised procedure. | 3 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Pliability, Cryotherapy, Hot temperature, Hyperthermia, induced, Randomized Controlled Trial, Hamstring muscles, Muscle stretching exercises