Hamstring Tightness and Lumbar Lordosis Angel Across Functional Sitting Posture.
Trial statusNot yet recruiting
Trial phaseNot listed
Trial typeObservational
Biological sexAll
Age18-45
SponsorCairo University
About this trial
The goal of this observational study is to learn about the relationship between hamstring tightness and the lumbar lordosis angle in sedentary adults across different sitting postures. The main question it aims to answer is:
Is hamstring tightness related to the lumbar lordosis angle across three functional sitting postures (upright, slumped, and forward-leaning)? It also asks whether hamstring tightness differs between men and women, whether it differs between the dominant and non-dominant leg, and whether the lumbar lordosis angle differs between men and women across the three postures.
Participants will have their hamstring tightness measured with the Active Knee Extension test and their lumbar lordosis angle measured with a bubble inclinometer while sitting in each of the three postures.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Healthy adults aged 18-45 years.
Sedentary occupation requiring > 6 hours of sitting per day.
Active Knee Extension (AKE) angle >15°.
Bilateral hamstring tightness.
Disqualifiers
History of significant low back pain requiring medical treatment in the past 12 months.
Previous spinal surgery or structural spinal deformities.
Lower extremity injury or surgery within the past 6 months.
Neurological disorders affecting sensation or movement.
Trial population
Sedentary adults of both sexes, aged 18 to 45 years, recruited from the Nasser institute hospital, and the surrounding community. Eligible participants are healthy individuals with a sedentary lifestyle (more than six hours of sitting per day and a physical-activity level below 600 MET-minutes per week on the International Physical Activity Questionnaire), a body mass index below 30 kg/m², and bilateral hamstring tightness, with no current low back pain or other excluding musculoskeletal, neurological, or spinal conditions
Trial design
Design model
Cohort
Time perspective
Cross-sectional
Treatments tested in this trial
Hamstring tightness and lumbar lordosis assessment
Other interventionHamstring tightness measured bilaterally with the Active Knee Extension test (digital goniometer) and lumbar lordosis angle (T12-S2) measured with a bubble inclinometer across three functional sitting postures. No therapeutic intervention is administered; these are observational measurements only.
Treatment groups
110 Participants
are divided into 1 treatment groupGroup A: Sedentary adults1 intervention
Trial outcomes
Primary outcomes
1
Correlation between hamstring tightness and lumbar lordosis angle across three functional sitting postures
Hamstring tightness is measured as the Active Knee Extension (AKE) deficit in degrees (mean of three trials per limb, using a digital goniometer). The lumbar lordosis angle is measured in degrees using a bubble inclinometer (T12-S2, mean of three trials per posture) in three functional sitting postures: upright, slumped, and forward-leaning. The association between hamstring tightness and the lumbar lordosis angle is assessed for each posture using the Pearson correlation coefficient.
Time frame
At a single assessment session (cross-sectional; Day 1).Secondary outcomes
1
Difference in hamstring tightness between males and females
Hamstring tightness (bilateral mean Active Knee Extension deficit, in degrees) compared between male and female participants.
Time frame
At a single assessment session (cross-sectional; Day 1).2
Difference in hamstring tightness between the dominant and non-dominant lower limb
Hamstring tightness (Active Knee Extension deficit, in degrees) compared between the dominant and non-dominant limb. Limb dominance is determined using a three-task behavioral battery.
Time frame
At a single assessment session (cross-sectional; Day 1).3
Difference in lumbar lordosis angle between males and females across the three sitting postures
Lumbar lordosis angle (degrees, bubble inclinometer, T12-S2) compared between male and female participants in each of the three functional sitting postures (upright, slumped, forward-leaning).
Time frame
At a single assessment session (cross-sectional; Day 1).Sponsors and contacts
Click on the lead sponsor to view all of their trials.
Cairo University
Lead sponsor
Nasser Institute For Research and Treatment
Sponsor institution
Source ClinicalTrials.gov
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