EMG Activation of Gluteal Musculature During Exercises With and Without Resistance

NCT01841216 | Completed Results

• 1 other identifier: SSR02
• Study Type: interventional
• Target: 30
• Locations: 1 country
• Sites: 1

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.

Conditions

Low Back Pain

Keywords

Gluteus Maximus; Gluteus Medius; TFL; EMG; Perceived Exertion; Thera-Band

Outcome Measures

Primary Outcomes (1)

• Percent of Maximal Voluntary Isometric Contraction (%MVIC)

  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.

  One 40 minute session

Secondary Outcomes (1)

• Perceived Exertion

  16 exercises during one 40 minute session

Study Arms (2)

Low Back Pain

EXPERIMENTAL

Lower Body Exercises with and without resistance

Device: Lower Body Exercises with and without resistance

Healthy

EXPERIMENTAL

Lower Body Exercises with and without resistance

Device: Lower Body Exercises with and without resistance

Interventions

Lower Body Exercises with and without resistance DEVICE

lower body exercises with and without resistance designed to activate the gluteal/hip musculature

Healthy; Low Back Pain

Eligibility Criteria

• Age: 18 Years - 65 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

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

You may not qualify if:

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

Sponsors & Collaborators

• Sport and Spine Rehab Clinical Research Foundation: lead

Study Sites (1)

Sport & Spine Rehab

Rockville, Maryland, 20852, United States

Location

MeSH Terms

Conditions

Low Back Pain

Condition Hierarchy (Ancestors)

Back Pain; Pain; Neurologic Manifestations; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Results Point of Contact

• Title: Jena Etnoyer, Clinical Research Coordinator
• Organization: Sport & Spine Rehab Clinical Research Foundation

jetnoyer@ssrehab.com

240-766-0300

Study Officials

• Barton Bishop, DPT

  Sport & Spine Rehab Clinical Research Foundation

  PRINCIPAL INVESTIGATOR

Publication Agreements

• PI is Sponsor Employee: No
• Restrictive Agreement: No

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NON RANDOMIZED
• Masking: NONE
• Purpose: DIAGNOSTIC
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: April 23, 2013
• First Posted: April 26, 2013
• Study Start: April 1, 2013
• Primary Completion: December 1, 2013
• Study Completion: December 1, 2013
• Last Updated: February 3, 2015
• Results First Posted: February 3, 2015

Record last verified: 2015-01

Locations

US (1)