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Supine to Long Sit Test

Purpose: To assess the contribution of the sacroiliac joint to an apparent leg length discrepancy.

Test Position: Supine.

Performing the Test: The examiner grasps the patient's legs above the ankles and fully flexes them, then extends them. The examiner then compares the two medial malleoli to see if a difference in position is present. Have the patient sit up, while keeping the legs extended. Compare the position of the medial malleoli again to see if there is a change. If there is a posterior innominate, the leg that appeared shorter will lengthen with the sit up. If there is an anterior innominate, the leg that appeared longer will shorten with the sit up.

Diagnostic Accuracy: Sensitivity: .44; Specificity: .64 ("Four clinical tests of sacroiliac joint dysfunction: the association of test results with innominate torsion among patients with and without back pain").

Importance of Test: This test can help in differentiating between a true leg length discrepancy and sacroiliac dysfunction, which obviously will help guide your plan of care by utilizing muscle energy techniques, manipulations, core exercises, etc. The reason a posterior innominate appears to lengthen following the situp is because activation of the hip flexors anteriorly rotates the innominate to return it to its normal position. A posterior innominate makes a leg appear shorter than the opposite side due to the altered position of the acetabulum. The opposite applies to the anterior innominate due to the restrictions (and in this case mobilizing nature) of the posterior tissues.

Note: tests should only be performed by a properly trained health care practitioner.
Picture
References:
Levangie PK. "Four clinical tests of sacroiliac joint dysfunction: the association of test results with innominate torsion among patients with and without back pain." Phys Ther. 1999 Nov;79(11):1043-57. Web. 08/19/2012.

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Copyright © The Student Physical Therapist LLC 2022
  • Home
  • About Us
  • Insider Access
    • About Insider Access
  • Online Courses
    • Hooper's Knee
    • Physical Therapist Entrepreneur Course
    • Physical Therapist Consultant Course
    • Orthopedic Management of the Cervical Spine
    • Return to Sport Essentials Course
  • Resources
    • Newsletter
    • Business Minded Sports Physio Podcast
    • Day in the Life of a Sports PT
    • Residency Corner
    • Special Tests >
      • Cervical Spine >
        • Alar Ligament Test
        • Bakody's Sign
        • Cervical Distraction Test
        • Cervical Rotation Lateral Flexion Test
        • Craniocervical Flexion Test (CCFT)
        • Deep Neck Flexor Endurance Test
        • Posterior-Anterior Segmental Mobility
        • Segmental Mobility
        • Sharp-Purser Test
        • Spurling's Maneuver
        • Transverse Ligament Test
        • ULNT - Median
        • ULNT - Radial
        • ULNT - Ulnar
        • Vertebral Artery Test
      • Thoracic Spine >
        • Adam's Forward Bend Test
        • Passive Neck Flexion Test
        • Thoracic Compression Test
        • Thoracic Distraction Test
        • Thoracic Foraminal Closure Test
      • Lumbar Spine/Sacroiliac Joint >
        • Active Sit-Up Test
        • Alternate Gillet Test
        • Crossed Straight Leg Raise Test
        • Extensor Endurance Test
        • FABER Test
        • Fortin's Sign
        • Gaenslen Test
        • Gillet Test
        • Gower's Sign
        • Lumbar Quadrant Test
        • POSH Test
        • Posteroanterior Mobility
        • Prone Knee Bend Test
        • Prone Instability Test
        • Resisted Abduction Test
        • Sacral Clearing Test
        • Seated Forward Flexion Test
        • SIJ Compression/Distraction Test
        • Slump Test
        • Sphinx Test
        • Spine Rotators & Multifidus Test
        • Squish Test
        • Standing Forward Flexion Test
        • Straight Leg Raise Test
        • Supine to Long Sit Test
      • Shoulder >
        • Active Compression Test
        • Anterior Apprehension
        • Biceps Load Test II
        • Drop Arm Sign
        • External Rotation Lag Sign
        • Hawkins-Kennedy Impingement Sign
        • Horizontal Adduction Test
        • Internal Rotation Lag Sign
        • Jobe Test
        • Ludington's Test
        • Neer Test
        • Painful Arc Sign
        • Pronated Load Test
        • Resisted Supination External Rotation Test
        • Speed's Test
        • Posterior Apprehension
        • Sulcus Sign
        • Thoracic Outlet Tests >
          • Adson's Test
          • Costoclavicular Brace
          • Hyperabduction Test
          • Roos (EAST)
        • Yergason's Test
      • Elbow >
        • Biceps Squeeze Test
        • Chair Sign
        • Cozen's Test
        • Elbow Extension Test
        • Medial Epicondylalgia Test
        • Mill's Test
        • Moving Valgus Stress Test
        • Push-up Sign
        • Ulnar Nerve Compression Test
        • Valgus Stress Test
        • Varus Stress Test
      • Wrist/Hand >
        • Allen's Test
        • Carpal Compression Test
        • Finkelstein Test
        • Phalen's Test
        • Reverse Phalen's Test
      • Hip >
        • Craig's Test
        • Dial Test
        • FABER Test
        • FAIR Test
        • Fitzgerald's Test
        • Hip Quadrant Test
        • Hop Test
        • Labral Anterior Impingement Test
        • Labral Posterior Impingement Test
        • Long-Axis Femoral Distraction Test
        • Noble Compression Test
        • Percussion Test
        • Sign of the Buttock
        • Trendelenburg Test
      • Knee >
        • Anterior Drawer Test
        • Dial Test (Tibial Rotation Test)
        • Joint Line Tenderness
        • Lachman Test
        • McMurray Test
        • Noble Compression Test
        • Pivot-Shift Test
        • Posterior Drawer Test
        • Posterior Sag Sign
        • Quad Active Test
        • Thessaly Test
        • Valgus Stress Test
        • Varus Stress Test
      • Foot/Ankle >
        • Anterior Drawer
        • Calf Squeeze Test
        • External Rotation Test
        • Fracture Screening Tests
        • Impingement Sign
        • Navicular Drop Test
        • Squeeze Test
        • Talar Tilt
        • Tarsal Tunnel Syndrome Test
        • Test for Interdigital Neuroma
        • Windlass Test