Reliability of Thoracic Spine Rotation Range-of-Motion Measurements in Healthy Adults

J Athl Train. 2012 Jan-Feb; 47(1): 52–60.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3418115/

Conclusions:

All techniques had good reliability and low levels of measurement error. The seated rotation, bar in front, and lumbar-locked rotation tests may be used reliably when more than 1 examiner is obtaining measurements (see below).