Electromechanical DissociationNCT01379105
Electromyographic Responses by Static Stretching and Neural Mobilization
A study testing neural mobilization and Static Stretching in people with Electromechanical Dissociation, run by Euro-American Network of Human Kinetics at 1 site in Brazil.
Trial summary
The objective of this experimental study was to compare the electromyographic responses of sedentary youth with and without the administration of static stretching and neural mobilization. Read more about this study
- Who is it for?
- Ages 17 to 30 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Electromechanical Dissociation
- What is being tested?
- neural mobilization and Static Stretching
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 45 participants
- Where
- 1 siteBrazil
- Study dates
- Aug 2010to Oct 2010
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 17 to 30 years
- Men only
- Healthy volunteers accepted
- Child, Adult
Who may be able to join
- students with the absence of neural, muscular and skeletal-associated problems
- who were non-obese, according to established body mass index
Who cannot join
- if they had metabolic disease
- neuro-musculo-skeletal problems,
- practiced certain physical activities,
- presented pain during maintenance of the position for electromyographic response collection or otherwise did not fulfill the terms of the agreement with the researcher.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Electromyographic Responses of Sedentary Students Submitted to Static Stretching and Neural Mobilization
The objective of this experimental study was to compare the electromyographic responses of sedentary youth with and without the administration of static stretching and neural mobilization. The sample was composed of sedentary students, divided, randomly, into neural mobilization practitioners (NMG; n=15; age=22±3 years), static stretching practitioners (SSG; n=15; age=23±4 years) and a control group (CG; n=15; age: 24±4 years). For this evaluation, an electromyograph (EMG; a four channel system) was used to monitor electrical activity in the femoral bicep muscles). In neural mobilization, hip flexion was conducted passively with the knee extended, and 30 plantar-to-dorsal flexion oscillations were completed per minute. For the static stretching, hip flexion with was completed passively with the knee extended and held for 6 seconds. The perception of effort was evaluated using the Perceived Force in Flexibility Scale. The statistical significance level was p<0.05. Descriptive statistics such as the average, standard deviation, median, standard error and absolute change within groups (post-test - pretest) were calculated. The sample normality was evaluated using the Shapiro-Wilk test. For the response variable analysis, the paired Student's t-test (paired) or Wilcoxon test (nonparametric) was used for intragroup analysis. For the intergroup analysis, the multivariate analysis of variance (ANOVA) test was used, followed by the Tukey Post-Hoc test. A p<0.05 significance level was adopted for the statistical evaluations. Microsoft Excel and the Statistical Package for Social Science (SPSS) version 14.0 were used for evaluation of the results.
Read the detailed description
This study was approved by the Committee for Ethics in Research with Humans of the Faculty of Medical Sciences (FACIME) (protocol number 145/09).
The group included students with the absence of neural, muscular and skeletal-associated problems and who were non-obese, according to established body mass index (BMI) criteria. Participants were excluded if they had metabolic disease or neuro-musculo-skeletal problems, practiced certain physical activities, presented pain during maintenance of the position for electromyographic response collection or otherwise did not fulfill the terms of the agreement with the researcher.
In the first stage, the researcher conducted an anamnesis of the individuals to obtain information about their dietary habits (Vasconcelos, 1995), medicines being used, pathological history and physical activity, according to the Baecke Questionnaire (Florindo, Latorre, 2003). In the second stage, the subjects' heights and body mass were measured for body mass index (BMI) evaluation using a Filizola 0-150 kg clinical scale (with a precision of 0.1 kg) and a mechanical 0-190 cm stadiometer (with a precision of 0.5 cm), following the recommendations of the International Society for the Advancement of Kinanthropometry (Marfell-Jonnes et al., 2006).
For the electromyography measurements, the subject was positioned in dorsal decubitus on a São Paulo Institute (ISP) model 4040 couch, and the researcher performed hip flexion and knee extension until tissue resistance, at which point the volunteer reported the sensation of "discomfort combined with pain'' by pressing a trigger button, and the signal was recorded for 2 seconds after this point. The speed with which the movements were made was slow and gradual, because, according to reports from Tanaka and Farah (2007), for the same degree of the range of motion, a greater stretching speed generates a higher impulse frequency in the afferent fibers near the terminal, such that a more intense reflex response is promoted.
The electrical activity of the femoral bicep muscle of the right thigh was recorded by a four channel EMG system with using superficial bipolar active electrodes (pre-amplified) with acquisition software and signal processing. The sampling frequency was 2,000 Hz, and the amplifier had a high-pass filter at 20 Hz and a low-pass filter at 500 Hz; a 12-bit analogical converter and computer completed the system.
In both interventions (SSG and NMG), the perception of strength was evaluated using the Perceived Strength and Flexibility Scale (PERFLEX)which presents five levels of intensity, varying from 0 to 110, with five corresponding verbal descriptors, so that the evaluated individual can point to the description of their perception corresponding to the amplitude of movement performed.
In the SSG group, the subject was positioned in dorsal decubitus, and the researcher performed hip flexion with the knee extended passively and held for 30 seconds; this type of stretching corresponds to the maintenance of increased amplitude posture, without surpassing the maximum movement limit, three times with an interval of 10 seconds between the repetitions (Nelson and Bandy, 2005). In the NMG group, the subject was positioned in dorsal decubitus, and the researcher performed hip flexion with the knee extended passively and performed 30 oscillations of plantar-to-dorsal flexion for one minute. In the SSG group, the subject was positioned in dorsal decubitus, and the researcher performed hip flexion with the knee extended passively and held for 30 seconds; this type of stretching corresponds to the maintenance of increased amplitude posture, without surpassing the maximum movement limit, three times with an interval of 10 seconds between the repetitions (Nelson and Bandy, 2005). In the NMG group, the subject was positioned in dorsal decubitus, and the researcher performed hip flexion with the knee extended passively and performed 30 oscillations of plantar-to-dorsal flexion for one minute.
- Conditions
- Electromechanical Dissociation
- Being tested
- neural mobilization, Static Stretching
- Keywords
- Electromyography, Muscle Stretching Exercises, Neuromuscular agents, Sedentary Lifestyle
- Medical subject headings
- Sedentary Behavior
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
neural mobilizationOther
Also called NM
In the neural mobilization group, the subject was positioned in dorsal decubitus, and the researcher performed hip flexion with the knee extended passively and performed 30 oscillations of plantar-to-dorsal flexion for one minute
Static StretchingOther
Also called Stretching
In the static stretching group, the subject was positioned in dorsal decubitus, and the researcher performed hip flexion with the knee extended passively and held for 30 seconds; this type of stretching corresponds to the maintenance of increased amplitude posture, without surpassing the maximum movement limit, three times with an interval of 10 seconds between the repetitions.
| Study group | Role | What they receive |
|---|---|---|
| electromyography | Other | The electrical activity of the femoral bicep muscle of the right thigh was recorded by a four channel EMG system with using superficial bipolar active electrodes (pre-amplified) with acquisition software and signal processing. The sampling frequency was 2,000 Hz, and the amplifier had a high-pass filter at 20 Hz and a low-pass filter at 500 Hz; a 12-bit analogical converter and computer completed the system Receives: Other: neural mobilization; Other: Static Stretching |
What is being measured
The primary outcome is the main question the study is designed to answer.
electromyography response
For the electromyography measurements, the researcher performed hip flexion and knee extension until tissue resistance, at which point the volunteer reported the sensation of "discomfort combined with pain'' by pressing a trigger button, and the signal was recorded for 2 seconds after this point. The speed with which the movements were made was slow and gradual, for the same degree of the range of motion, a greater stretching speed generates a higher impulse frequency in the afferent fibers near the terminal, such that a more intense reflex response is promoted.
Measured: four seconds to take the signal
Secondary outcomes (1)
Flexibility effort
In both interventions (neural mobilization - NMG and static stretching - SSG), the perception of stretching was evaluated using the Perceived Strength and Flexibility Scale (PERFLEX), which presents five levels of intensity, varying from 0 to 110, with five corresponding verbal descriptors, so that the evaluated individual can point to the description of their perception corresponding to the amplitude of movement performed: 0 to 30, "normal"; 31 to 60, "strain"; 61 to 80, "discomfort"; 81 to 90, "bearable pain"; and 91 to 110, "strong pain".
Measured: 30 seconds
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted23 Jun 2011 (estimated)
- Study startAug 2010
- Primary completionSep 2010
- Study completionOct 2010
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Electromechanical DissociationStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- None (open label)
- Enrolment
- 45 participants (actual)
Sponsor and investigators
- Lead sponsor
- Euro-American Network of Human Kinetics
- Sponsor type
- University, hospital or other
- Investigators
- rauena Lopes, Mst, Principal investigator, Euro American Network Human Kinetics
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01379105
- Sponsor's protocol ID
- 0111
- Status last verified
- Jun 2011
- First submitted
- 20 Jun 2011
- Last updated
- 23 Jun 2011
- Results posted
- No
- Data monitoring committee
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 23 Jun 2011. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Electromyographic Responses of Sedentary Students Submitted to Static Stretching and Neural Mobilization
- ClinicalTrials.gov ID
- NCT01379105
- Acronym / sponsor ID
- 0111
- Conditions
- Electromechanical Dissociation
- Keywords
- Electromyography, Muscle Stretching Exercises, Neuromuscular agents, Sedentary Lifestyle
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 45 participants (actual)
- Lead sponsor
- Euro-American Network of Human KineticsUniversity, hospital or other
- Study start
- Aug 2010
- Primary completion
- Sep 2010 (actual)
- Study completion
- Oct 2010 (actual)
- First posted
- 23 Jun 2011 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The objective of this experimental study was to compare the electromyographic responses of sedentary youth with and without the administration of static stretching and neural mobilization. The sample was composed of sedentary students, divided, randomly, into neural mobilization practitioners (NMG; n=15; age=22±3 years), static stretching practitioners (SSG; n=15; age=23±4 years) and a control group (CG; n=15; age: 24±4 years). For this evaluation, an electromyograph (EMG; a four channel system) was used to monitor electrical activity in the femoral bicep muscles). In neural mobilization, hip flexion was conducted passively with the knee extended, and 30 plantar-to-dorsal flexion oscillations were completed per minute. For the static stretching, hip flexion with was completed passively with the knee extended and held for 6 seconds. The perception of effort was evaluated using the Perceived Force in Flexibility Scale. The statistical significance level was p<0.05. Descriptive statistics such as the average, standard deviation, median, standard error and absolute change within groups (post-test - pretest) were calculated. The sample normality was evaluated using the Shapiro-Wilk test. For the response variable analysis, the paired Student's t-test (paired) or Wilcoxon test (nonparametric) was used for intragroup analysis. For the intergroup analysis, the multivariate analysis of variance (ANOVA) test was used, followed by the Tukey Post-Hoc test. A p<0.05 significance level was adopted for the statistical evaluations. Microsoft Excel and the Statistical Package for Social Science (SPSS) version 14.0 were used for evaluation of the results.
Detailed description
This study was approved by the Committee for Ethics in Research with Humans of the Faculty of Medical Sciences (FACIME) (protocol number 145/09).
The group included students with the absence of neural, muscular and skeletal-associated problems and who were non-obese, according to established body mass index (BMI) criteria. Participants were excluded if they had metabolic disease or neuro-musculo-skeletal problems, practiced certain physical activities, presented pain during maintenance of the position for electromyographic response collection or otherwise did not fulfill the terms of the agreement with the researcher.
In the first stage, the researcher conducted an anamnesis of the individuals to obtain information about their dietary habits (Vasconcelos, 1995), medicines being used, pathological history and physical activity, according to the Baecke Questionnaire (Florindo, Latorre, 2003). In the second stage, the subjects' heights and body mass were measured for body mass index (BMI) evaluation using a Filizola 0-150 kg clinical scale (with a precision of 0.1 kg) and a mechanical 0-190 cm stadiometer (with a precision of 0.5 cm), following the recommendations of the International Society for the Advancement of Kinanthropometry (Marfell-Jonnes et al., 2006).
For the electromyography measurements, the subject was positioned in dorsal decubitus on a São Paulo Institute (ISP) model 4040 couch, and the researcher performed hip flexion and knee extension until tissue resistance, at which point the volunteer reported the sensation of "discomfort combined with pain'' by pressing a trigger button, and the signal was recorded for 2 seconds after this point. The speed with which the movements were made was slow and gradual, because, according to reports from Tanaka and Farah (2007), for the same degree of the range of motion, a greater stretching speed generates a higher impulse frequency in the afferent fibers near the terminal, such that a more intense reflex response is promoted.
The electrical activity of the femoral bicep muscle of the right thigh was recorded by a four channel EMG system with using superficial bipolar active electrodes (pre-amplified) with acquisition software and signal processing. The sampling frequency was 2,000 Hz, and the amplifier had a high-pass filter at 20 Hz and a low-pass filter at 500 Hz; a 12-bit analogical converter and computer completed the system.
In both interventions (SSG and NMG), the perception of strength was evaluated using the Perceived Strength and Flexibility Scale (PERFLEX)which presents five levels of intensity, varying from 0 to 110, with five corresponding verbal descriptors, so that the evaluated individual can point to the description of their perception corresponding to the amplitude of movement performed.
In the SSG group, the subject was positioned in dorsal decubitus, and the researcher performed hip flexion with the knee extended passively and held for 30 seconds; this type of stretching corresponds to the maintenance of increased amplitude posture, without surpassing the maximum movement limit, three times with an interval of 10 seconds between the repetitions (Nelson and Bandy, 2005). In the NMG group, the subject was positioned in dorsal decubitus, and the researcher performed hip flexion with the knee extended passively and performed 30 oscillations of plantar-to-dorsal flexion for one minute. In the SSG group, the subject was positioned in dorsal decubitus, and the researcher performed hip flexion with the knee extended passively and held for 30 seconds; this type of stretching corresponds to the maintenance of increased amplitude posture, without surpassing the maximum movement limit, three times with an interval of 10 seconds between the repetitions (Nelson and Bandy, 2005). In the NMG group, the subject was positioned in dorsal decubitus, and the researcher performed hip flexion with the knee extended passively and performed 30 oscillations of plantar-to-dorsal flexion for one minute.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| electromyography | Other | Other: neural mobilization, Other: Static StretchingThe electrical activity of the femoral bicep muscle of the right thigh was recorded by a four channel EMG system with using superficial bipolar active electrodes (pre-amplified) with acquisition software and signal processing. The sampling frequency was 2,000 Hz, and the amplifier had a high-pass filter at 20 Hz and a low-pass filter at 500 Hz; a 12-bit analogical converter and computer completed the system |
Who may qualify
- Ages
- 17 to 30 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult
Key inclusion criteria (2 listed)
- students with the absence of neural, muscular and skeletal-associated problems
- who were non-obese, according to established body mass index
Key exclusion criteria (4 listed)
- if they had metabolic disease
- neuro-musculo-skeletal problems,
- practiced certain physical activities,
- presented pain during maintenance of the position for electromyographic response collection or otherwise did not fulfill the terms of the agreement with the researcher.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| neural mobilizationAlso: NMIn the neural mobilization group, the subject was positioned in dorsal decubitus, and the researcher performed hip flexion with the knee extended passively and performed 30 oscillations of plantar-to-dorsal flexion for one minute | Other | electromyography |
| Static StretchingAlso: StretchingIn the static stretching group, the subject was positioned in dorsal decubitus, and the researcher performed hip flexion with the knee extended passively and held for 30 seconds; this type of stretching corresponds to the maintenance of increased amplitude posture, without surpassing the maximum movement limit, three times with an interval of 10 seconds between the repetitions. | Other | electromyography |
Primary outcome
electromyography response
Time frame: four seconds to take the signal
For the electromyography measurements, the researcher performed hip flexion and knee extension until tissue resistance, at which point the volunteer reported the sensation of "discomfort combined with pain'' by pressing a trigger button, and the signal was recorded for 2 seconds after this point. The speed with which the movements were made was slow and gradual, for the same degree of the range of motion, a greater stretching speed generates a higher impulse frequency in the afferent fibers near the terminal, such that a more intense reflex response is promoted.
1 secondary outcome
Flexibility effort
Time frame: 30 seconds
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 23 Jun 2011.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
rauena Lopes, Mst principal investigator
Euro American Network Human Kinetics
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing neural mobilization and Static Stretching in people with Electromechanical Dissociation, run by Euro-American Network of Human Kinetics at 1 site in Brazil.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 23 Jun 2011. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Brazil. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
electromyography response (time frame: four seconds to take the signal). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 23 Jun 2011.