Clinical trial NCT01841216: EMG Activation of Gluteal Musculature During Exercises With and Without Resistance
Official title: EMG Activation of Gluteal Musculature and Perceived Exertion During Therapeutic Exercises With and Without Thera-Band® Resistance
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Low Back Pain
Keywords: Gluteus Maximus
Gluteus Medius
TFL
EMG
Perceived Exertion
Thera-Band
Lead sponsor: Sport and Spine Rehab Clinical Research Foundation
Sponsor class: OTHER
First posted: 2013-04-26
Enrollment: 30
Sex: ALL
Minimum age (years): 18
Maximum age (years): 65
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: NON_RANDOMIZED
Intervention model: PARALLEL
Primary purpose: DIAGNOSTIC

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.


Eligibility 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

Primary outcomes:
measure: Percent of Maximal Voluntary Isometric Contraction (%MVIC)
timeFrame: One 40 minute session
Secondary outcomes:
measure: Perceived Exertion
timeFrame: 16 exercises during one 40 minute session
Other outcomes:
Locations:
city: Rockville
country: United States
facility: Sport & Spine Rehab
state: Maryland
Study officials:
affiliation: Sport & Spine Rehab Clinical Research Foundation
name: Barton Bishop, DPT
role: PRINCIPAL_INVESTIGATOR
References: