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Context:  Knee bending during tests of lumbar forward bending (FB) may introduce confounding variability. Precluding bending at the knees has, therefore, long been standard protocol to produce valid and reproducible results. However, there is limited research on cervical spine bending as a confounding variable in whole trunk and lumbar FB.

Cervical Spine Bending: A Factor Confounding Whole Trunk and Lumbar Forward Bending Range of Motion