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Soleus H-Reflex in Different Sitting Postures

This study has been completed.
Sponsor:
Collaborator:
The Saudi Arabian Cultural Mission to the United States
Information provided by (Responsible Party):
Hamad Al Amer, Texas Woman's University
ClinicalTrials.gov Identifier:
NCT01744899
First received: September 26, 2012
Last updated: December 5, 2012
Last verified: December 2012
History of Changes
  Purpose

The purpose of this study was to examine the effect of prolonged sitting duration and three different sitting postures (erect, slumped, and slouched sitting postures) on spinal nerve root function by measuring the soleus (SOL) H-reflex amplitude. In addition, the pressure under the ischial tuberosities during the three sitting postures were assessed and correlated with the SOL H-reflex amplitude.


Condition Intervention
Compression of Spinal Nerve Root
Spinal Disorder
Low Back Pain
 Other: Sitting posture

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Cross-Sectional
Official Title: The Influence of Different Sitting Postures on Soleus H-Reflex in Normal Subjects

Resource links provided by NLM:

U.S. FDA Resources

Further study details as provided by Texas Woman's University:

Primary Outcome Measures:
  • Lumbosacral nerve root function by as measured by the soleus H-reflex amplitude [ Time Frame: The outcome was measured during one session that lasted for an average of 3 hours. No further measurement was performed after that session. ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Pressure under the ischial tuberosities [ Time Frame: The outcome was measured during one session that lasted for an average of 3 hours. No further measurement was performed after that session. ] [ Designated as safety issue: No ]
    Pressure under the ischial tuberosities was measured in millimeter of mercury (mmHg), with 0 mmHg representing no ischial pressure and 644 mmHg representing the highest pressure.


Enrollment: 30
Study Start Date: January 2012
Study Completion Date: May 2012
Primary Completion Date: May 2012 (Final data collection date for primary outcome measure)
Groups/Cohorts Assigned Interventions
Prolonged sitting
Includes individuals who spent an average of at least 6 hours a day sitting over the past year.
 Other: Sitting posture
The outcomes were measured while the participants assumed erect, slumped and slouched sitting postures.
Control
Includes individuals who spent 4 hours or less/day sitting over the past year.
 Other: Sitting posture
The outcomes were measured while the participants assumed erect, slumped and slouched sitting postures.

Detailed Description:

Participants were assigned to two groups (prolonged sitting group and controls) based on their daily sitting duration with 15 participants in each group. The outcome measures were recorded during erect, slumped and slouched sitting postures. The differences between the two groups and the three sitting postures in the outcome measures were examined for statistical significance.

  Eligibility

Ages Eligible for Study:   18 Years to 50 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population

Healthy adults from both genders.

Criteria

Inclusion Criteria:

  • Able to read, speak, and understand English

Exclusion Criteria:

  1. Current complaint of low back pain.
  2. Current injury to the ankle and/or foot.
  3. Limited ankle movement.
  4. Leg length discrepancy.
  5. Scoliosis.

  6. History of:

    • Back surgery.
    • Calf muscle injury/surgery.
    • Radicular symptoms.
    • Peripheral neuropathy.
    • Upper motor neuron lesion.
    • Systemic and metabolic diseases.
    • Cancer.
  7. Pregnant at the time of the study.
  8. Use of pain medications at the time of the study.
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT01744899

Locations
United States, Texas
Texas Woman's University
Houston, Texas, United States, 77030
Sponsors and Collaborators
Texas Woman's University
The Saudi Arabian Cultural Mission to the United States
Investigators
Principal Investigator: Hamad S Al Amer, MS Texas Woman's University
  More Information

No publications provided

Responsible Party: Hamad Al Amer, Mr, Texas Woman's University
ClinicalTrials.gov Identifier: NCT01744899     History of Changes
Other Study ID Numbers: 16518
Study First Received: September 26, 2012
Last Updated: December 5, 2012
Health Authority: United States: Institutional Review Board

Keywords provided by Texas Woman's University:
Lumbosacral spine
Nerve roots
Sitting
H-reflex

Additional relevant MeSH terms:
Back Pain
Low Back Pain
Spinal Diseases
Pain
Neurologic Manifestations
 Nervous System Diseases
Signs and Symptoms
Bone Diseases
Musculoskeletal Diseases

ClinicalTrials.gov processed this record on June 17, 2013