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EMG Activation of Gluteal Musculature During Exercises With and Without Resistance (GlutEMG02)

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ClinicalTrials.gov Identifier: NCT01841216
Recruitment Status : Completed
First Posted : April 26, 2013
Results First Posted : February 3, 2015
Last Update Posted : February 3, 2015
Sponsor:
Information provided by (Responsible Party):
Sport and Spine Rehab Clinical Research Foundation

Brief Summary:
The gluteus medius (Gmed) and gluteus maximus (Gmax) muscles are important components in the treatment of many lower limb injuries. Recent studies have evaluated a myriad of exercises which activate the Gmed and Gmax, but limited research remains on exercises involving resistance and the role of the TFL. The purpose of this study is to evaluate Gmed, Gmax, and TFL percent maximal voluntary isometric contraction (%MVIC) and perceived exertion in healthy and low back pain patients while performing exercises with and without resistance. Methods: A convenience sample of healthy subjects and patients diagnosed with non-radicular low back pain will be recruited. Exclusionary criteria will include: current low back or lower extremity injury (healthy group), pregnancy, history of hip surgery, and radicular symptoms. Surface electromyography will be used to quantify the activity level of the gluteal muscles and TFL while performing a series of 8 exercises with and without Thera-Band® Resistance Tubing and Stability Trainer. The maximal voluntary isometric contraction (MVIC) will be established for each muscle group and the order of exercises performed will be randomized to minimize the effect of fatigue. Following the completion of each exercise, the patient will rate their perceived exertion level on the Thera-Band® Resistance Intensity Scale for Exercise (RISE). The EMG signals will be smoothed and rectified and analyzed using a root-mean-square algorithm. Clinical Relevance: The results of this study will allow clinicians to better prescribe exercises, proven to activate the gluteal muscles and limit the TFL involvement, in the treatment of low back pain.

Condition or disease Intervention/treatment Phase
Low Back Pain Device: Lower Body Exercises with and without resistance Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 30 participants
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: EMG Activation of Gluteal Musculature and Perceived Exertion During Therapeutic Exercises With and Without Thera-Band® Resistance
Study Start Date : April 2013
Actual Primary Completion Date : December 2013
Actual Study Completion Date : December 2013

Resource links provided by the National Library of Medicine


Arm Intervention/treatment
Experimental: Low Back Pain
Lower Body Exercises with and without resistance
Device: Lower Body Exercises with and without resistance
lower body exercises with and without resistance designed to activate the gluteal/hip musculature

Experimental: Healthy
Lower Body Exercises with and without resistance
Device: Lower Body Exercises with and without resistance
lower body exercises with and without resistance designed to activate the gluteal/hip musculature




Primary Outcome Measures :
  1. Percent of Maximal Voluntary Isometric Contraction (%MVIC) [ Time Frame: One 40 minute session ]
    Percent of Maximal Voluntary Isometric Contraction was measured by placing EMG leads on selected muscles. Data was collected and analyzed with the MyoResearch XP Masters Edition (Noraxam Inc., Scottsdale, AZ). The EMG signals were smoothed and rectified and analyzed using a root-mean-square algorithm. We used visual onset and offset of the EMG signal amplitude to select the middle 3 of 5 trials. The middle three repetitions were analyzed. Average activation and peak activation were determined and then compared to the maximum voluntary isometric contraction (MVIC), captured during a manual muscle test, for each muscle group, and expressed as a %MVIC. The %MVIC can be greater than 100% since the MVIC is captured in a stationary, isometric position using manual force and all other activities are performed in motion against elastic or gravity resistance.


Secondary Outcome Measures :
  1. Perceived Exertion [ Time Frame: 16 exercises during one 40 minute session ]
    Thera-Band(R) RISE (Resistance Intensity Scale for Exercise) Scale to measure amount of perceived exertion during resistance band exercises. This is a scale 0 to 10, 0 being extremely easy and 10 being extremely hard. The subject rated the intensity or resistance felt on each exercise on this scale. The ideal range for an exercise is in the middle of the scale (4-7) where the subject is feeling resistance but is not maximally exerted.



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Ages Eligible for Study:   18 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • healthy, physically active subjects
  • patients diagnosed with non-radicular low back pain
  • 18-65

Exclusion Criteria:

  • current low back or lower extremity injury (healthy group)
  • pregnancy
  • history of hip surgery
  • radicular symptoms

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01841216


Locations
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United States, Maryland
Sport & Spine Rehab
Rockville, Maryland, United States, 20852
Sponsors and Collaborators
Sport and Spine Rehab Clinical Research Foundation
Investigators
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Principal Investigator: Barton Bishop, DPT Sport & Spine Rehab Clinical Research Foundation

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Responsible Party: Sport and Spine Rehab Clinical Research Foundation
ClinicalTrials.gov Identifier: NCT01841216     History of Changes
Other Study ID Numbers: SSR02
First Posted: April 26, 2013    Key Record Dates
Results First Posted: February 3, 2015
Last Update Posted: February 3, 2015
Last Verified: January 2015
Keywords provided by Sport and Spine Rehab Clinical Research Foundation:
Gluteus Maximus
Gluteus Medius
TFL
EMG
Perceived Exertion
Thera-Band
Additional relevant MeSH terms:
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Back Pain
Low Back Pain
Pain
Neurologic Manifestations
Signs and Symptoms