Extension *

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Spine Extension

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Description of Movement

Spine Extension is the movement of the trunk (lumbar and thoracic spines) backward in the sagittal plane as bending over backwards in preparation to throwing a basket ball


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Range 30 degrees

  • Total 120° (70° – 90° true spinal extension) from 90° of full flexion to 30° of full extension
  • Observe from the side

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Imagine a line through hip and shoulder joint deviating from lateral plumb line [/vc_column_text][/vc_tta_section][vc_tta_section i_icon_fontawesome=”fa fa-cutlery” title=”ADLs” tab_id=”1453645239739-f808ec1d-a6b2584b-831a” add_icon=”true”][vc_column_text]

ADLs affected by restriction

  • Standing for long periods
  • Lifting heavy objects
  • Sitting for long periods

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Special Notes

  • A lot of the esxtension happens in the lumbar spine (75%), not so much in the thoracic spine
  • Consider the effects excessive hip extension has on iliopsoas and other hip flexors  TIP 142
  • Consider eccentric contractions  TIP 117
  • Injuries are most common around L4 and L5 as they have to carry the greatest load
  • Perform test in prone if they are getting dizzy, extension will be more like a strength test as they have to lift the upper body off the table This will give sufficient information on the strength of the erector muscle
  • It is quite common to find that the upper rectus abdominis is short and the lower portion of it is overstretched
  • Check the perfomance of the gluteal muscles  TIP 149

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