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      • 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
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      • Standing Forward Flexion Test
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Go to Return to Sport Functional Tests

Rate of Force Development as an Adjunctive Outcome Measure for Return-to-Sport Decisions After Anterior Cruciate Ligament Reconstruction

2/15/2013

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Picture
Return to play criteria following ACL reconstruction has been a debated topic, especially as of late. Unfortunately, we do not have clear cut objective tests that will tell us when an athlete is ready to go back onto the field safely and effectively.  Common tests, such as the single leg hop test, is often used as a test in the terminal phases of rehabilitation. Other objective data such as strength has been tested to determine the deficits between involved knee vs uninvolved knee. However, we are unsure whether strength translates over to field play.  

In this study, rate of force development was the primary focus. The authors define RFD as the ability to produce a muscle force quickly. The study used professional soccer players over a span of 6 seasons. The athletes who suffered an ACL tear underwent surgery and all started on the same rehabilitation program.  However, what was different was that at 6 months post-op the athletes underwent an additional 20 weeks of a training program focusing on RFD development.  The authors decided to recommend this additional 20 weeks due to significant deficits in RFD at 6 months.  Below are some of the key points of the article:  

-  One criterion that has been used to determine recovery and readiness to return to sport following an ACL recon- struction is achieving 85% or 90% of the maximal strength of the contralateral limb.  However, it has been shown that the time required to develop muscular strength in many types of daily2 and sports activities38 is considerably shorter (0-200 milliseconds) than that required to achieve maximal contraction strength (300 milliseconds or greater).

-  The RFD measured under isometric conditions has been identified as a key parameter characterizing the extent of neural drive to the muscle during explo- sive muscle actions.

-  The subsequent post hoc analysis indicated no significant difference in RFD30 values between the involved and uninvolved limbs measured at baseline (preinjury) and at 12 months postreconstruction. However, there was a significant difference between limbs at 6 months post-reconstruction.

-  For the involved limb, there was a significant difference in RFD30 values between baseline and 6 months, but not between baseline and 12 months

-  At 6 months post-reconstruction, the average RFD30 value for the involved side was only 80% of the baseline value (TABLE 1, FIGURE 3) and only 79% of the value of the uninvolved side, which was also mea- sured at 6 months postreconstruction

-  At 12 months postreconstruction, the mean RFD30 value for the involved side was 98% of the baseline value and 97% of the value of the uninvolved side.

So this asks the question: Should we be looking at RFD more closely as an indicator for return to sport?  Is it more applicable/transferable to sports play?  

For those of you who are part of the Sports Performance Special Interest Group in the Sports Section, this article was just brought up with a lot of good discussion!  

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  • Home
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  • Chris' Corner
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    • Orthopedic Blog
  • 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
    • HEP >
      • Neck and Shoulder >
        • Supine Chin Tuck
        • Supine DNF with Towel Assist
        • Supine DNF
        • Standing Chin Tuck Against Wall
        • Standing Chin Tuck Against Wall with Scaption
        • Seated Cervical Retraction Repeated
        • Seated Cervical Retraction with Extension Repeated
        • Seated Cervical Retraction with Sidebend Repeated
        • Seated Cervical Retraction with Rotation Repeated
        • Standing Wall Shrugs at 90 Degrees Flex
        • Seated Thoracic Whips
        • Standing Ballistic Shoulder Extensions
        • Standing Repeated Shoulder Extension with Squat
        • Standing Repetead Shoulder Horiz. Abd. with Ext. CKC
        • Seated with Arms on Pillows Cervical AROM (Flex/Ext/Rot/SB)
        • Seated with Arms on Pillows Shrugs
        • Seated with Arms on Pillows Shrug with Scapular Retraction
        • Supine Shoulder IR with GH Centralization
        • Supine Shoulder ER with GH Centralization
        • Holding Dumbbell at 180 Degrees Flexion for Time
        • Cat Camel
        • Prone T's
        • Prone Y's
        • Quad Chin Tuck w/ Shoulder Flexion
      • Low Back >
        • Supine TA Isometric
        • Standing TA Isometric Agains Wall with Squat
        • Supine BKFO
        • Quad Rock Back
        • Standing Hip Hinge
        • Sit to Stand with Hip Hinge
        • Repeated Lumbar Sideglides
        • Repeated Standing Lumbar Extension
        • Repeated Standing Lumbar Flexion
        • Repeated Prone Press-Ups
        • Repeated Supine DKC
        • Slump Sciatic Nerve Glides
        • Birddog Progression
      • Hip and Knee >
        • Clamshells with Progressions
        • Fire Hydrants with Progressions
        • Donkey Kicks
        • Bridge Variations
        • Repeated Hip Flexion
        • Squats
        • Seated Repeated Knee Extensions
        • CKC Seated Repeated Knee Extensions
        • Heel Slides
        • CKC DF with Tibial IR
      • Foot and Ankle >
        • Calf Raises
        • Calf Raises with Soccer Ball Between Medial Malleoli
        • Towel Scrunches with Foot in PF
        • Toe Flexion Using T-Band with Foot in PF
        • PF with Toes Flexed Using T-Band
        • DF with Toes Flexed Using T-Band
        • Forefoot Adduction
        • Gastroc Stretch
        • Repeated PF
      • Examination Templates