Thoracic Spine Range of Motion: Kyphosis and Reproducibility Testing
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The two-inclinometer technique used for measuring thoracic spine range of motion is discussed in Section 15.10, ROM: Thoracic Spine, of the Guides beginning on page 411. After proper identification of the T1 and T12 spinous processes, the angle of minimum kyphosis can be determined by setting both inclinometers to neutral O° position against a wall and then measuring thoracic kyphosis angle with the examinee in a standing or seated position.

Thoracic flexion motion can also be measured in an erect standing or seated position. In order to determine if the motion values obtained are reliable, measurements should be obtained in both positions. The Guides state that the results should be "nearly identical".