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Completed

NCT Number: NCT01744899

Soleus H-Reflex in Different Sitting Postures

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.

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Key information

Conditions

Compression of Spinal Nerve Root Back Pain Bone Diseases Low Back Pain Musculoskeletal Diseases Nervous System Diseases Neurologic Manifestations Neuromuscular Diseases Pain Pathological Conditions, Signs and Symptoms Peripheral Nervous System Diseases Radiculopathy Signs and Symptoms Spinal Diseases Spinal Disorder

Age range

18 year–50 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Texas Woman's University

Houston, Texas, 77030, United States

About this study

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.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Able to read, speak, and understand English

Exclusion criteria

  • Current complaint of low back pain.
  • Current injury to the ankle and/or foot.
  • Limited ankle movement.
  • Leg length discrepancy.
  • Scoliosis.
  • History of:
  • Back surgery.
  • Calf muscle injury/surgery.
  • Radicular symptoms.
  • Peripheral neuropathy.
  • Upper motor neuron lesion.
  • Systemic and metabolic diseases.
  • Cancer.
  • Pregnant at the time of the study.
  • Use of pain medications at the time of the study.

Treatment and study plan

Sitting posture

Other

The outcomes were measured while the participants assumed erect, slumped and slouched sitting postures.

Primary outcomes

  1. 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.

Secondary outcomes

  1. 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.

    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.

Sponsors and collaborators

Lead sponsor

Texas Woman's University

Other

Collaborators

  • The Saudi Arabian Cultural Mission to the United States

Registry information

Official study title

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

Important dates

Study start
2012
Primary completion
2012
Study completion
2012
First posted
Dec 7, 2012
Registry last updated
Dec 7, 2012

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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