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Joseph Myers, John Jolly, Takashi Nagai, and Scott Lephart

Context:

In vivo scapular kinematics during humeral movements are commonly assessed with electromagnetic tracking devices despite few published data related to reliability and precision of these measurements.

Objective:

To determine the intrasession reliability and precision of assessing scapular kinematics using an electromagnetic tracking device.

Design:

Scapular position and orientation were measured with an electromagnetic tracking device during humeral elevation/depression in several planes. Intrasession reliability and precision were established by comparing 2 trials performed in succession.

Setting:

A human-movement research laboratory.

Participants:

15 healthy individuals.

Main Outcome Measures:

Intrasession intraclass correlation coefficients and standard error of measurement of all scapular variables were established.

Results:

The mean intrasession reliability for all variables was ICC = .97 ± .03. The mean intrasession precision was .99° ± .36°.

Conclusions:

In vivo scapular kinematics can be measured with high reliability and precision during intrasession research designs.