Soleus H-Reflex in Different Sitting Postures

Low Back Pain Clinical Trial

Official title:

The Influence of Different Sitting Postures on Soleus H-Reflex in Normal Subjects

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01744899
• Other study ID #: 16518
• Status: Completed
• Phase: N/A
• First received: September 26, 2012
• Last updated: December 5, 2012
• Start date: January 2012
• Est. completion date: May 2012

Study information

• Verified date: December 2012
• Source: Texas Woman's University
• Contact: n/a
• Is FDA regulated: No
• Health authority: United States: Institutional Review Board
• Study type: Observational

Clinical Trial Summary

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.

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 30
• Est. completion date: May 2012
• Est. primary completion date: May 2012
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Both
• Age group: 18 Years to 50 Years

Eligibility

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.

Study Design

Observational Model: Case Control, Time Perspective: Cross-Sectional

Related Conditions & MeSH terms

• Compression of Spinal Nerve Root
• Low Back Pain
• Spinal Diseases
• Spinal Disorder

Intervention

Other:
• Sitting posture
The outcomes were measured while the participants assumed erect, slumped and slouched sitting postures.

Locations

Country	Name	City	State
United States	Texas Woman's University	Houston	Texas

Sponsors (2)

Lead Sponsor	Collaborator
Texas Woman's University	The Saudi Arabian Cultural Mission to the United States

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Lumbosacral nerve root function by as measured by the soleus H-reflex amplitude		The outcome was measured during one session that lasted for an average of 3 hours. No further measurement was performed after that session.	No
Secondary	Pressure under the ischial tuberosities	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.	The outcome was measured during one session that lasted for an average of 3 hours. No further measurement was performed after that session.	No