A standard plinth and Baseline® bubble inclinometer, (model 12-1056, Fabrication Enterprises; White
Plains, New York) was used for all measurements.
The PST measurement required the use of a velcro strap to secure the inclinometer to the participants’ mid-humerus (Figure 1A) during the procedure.
A 24 inch bubble level, (model 7724-0, Johnson Level & Tool; Mequon, Wisconsin) anchored to a carpenter’s square of similar dimension, (model 45-500, Stanley Works; New Britain, Connecticut) was used during the PST measurement to set the inclinometer at an accurate zero starting point relative to the vertical plane (Figure 1B). The bubble level was used to ensure that the participants’ trunk was directly perpendicular to the plinth upon initiating the PST measurement