Electromyographic Responses by Static Stretching and Neural Mobilization

NCT01379105 | Completed DMC

• 1 other identifier: 0111
• Study Type: interventional
• Target: 45
• Locations: 1 country
• Sites: 1

Brief 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. 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.

Conditions

Electromechanical Dissociation

Keywords

Electromyography; Muscle Stretching Exercises; Neuromuscular agents; Sedentary Lifestyle

Outcome Measures

Primary Outcomes (1)

• 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.

  four seconds to take the signal

Secondary Outcomes (1)

• Flexibility effort

  30 seconds

Study Arms (1)

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

Other: neural mobilization; Other: Static Stretching

Interventions

neural mobilization OTHER

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

Also known as: NM

electromyography

Static Stretching OTHER

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.

Also known as: Stretching

electromyography

Eligibility Criteria

• Age: 17 Years - 30 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64)

You may qualify if:

• students with the absence of neural, muscular and skeletal-associated problems
• who were non-obese, according to established body mass index

You may not qualify if:

• 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.

Sponsors & Collaborators

• Euro-American Network of Human Kinetics: lead

Study Sites (1)

College Santo Agostinho

Teresina, Piauí, 64079-330, Brazil

Location

MeSH Terms

Conditions

Sedentary Behavior

Interventions

Muscle Stretching Exercises

Condition Hierarchy (Ancestors)

Behavior

Intervention Hierarchy (Ancestors)

Exercise Therapy; Rehabilitation; Aftercare; Continuity of Patient Care; Patient Care; Therapeutics; Physical Therapy Modalities; Exercise; Motor Activity; Movement; Musculoskeletal Physiological Phenomena; Musculoskeletal and Neural Physiological Phenomena

Study Officials

• rauena Lopes, Mst

  Euro American Network Human Kinetics

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER

Study Record Dates

• First Submitted: June 20, 2011
• First Posted: June 23, 2011
• Study Start: August 1, 2010
• Primary Completion: September 1, 2010
• Study Completion: October 1, 2010
• Last Updated: June 23, 2011

Record last verified: 2011-06

Locations

BR (1)