Testing the Validity of the InjurySway App and Vibration’s Effect on Shoulder Control

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Florida Southern College
Upper extremity stability is critical for injury prevention. Vibration may improve proprioception, reducing injury risk. Mobile applications are accessible reliable tools to measure recovery in athletes. One research purpose investigated whether the InjurySway iPhone app is a valid measure of upper extremity proprioception. The other was whether an acute bout of shoulder exercise performed with an inexpensive vibration toy improves shoulder position sense. Each session, the subject held the phone on the palm, arm forward for 20 seconds both arms. Each subject then completed a Full Can exercise set with the randomly assigned Bumble Ball state (vibration/no vibration) and repeated the app stability measure. Subjects completed a session with the Closed Kinetic Chain Upper Extremity Stability Test (CKCUEST). Subjects assumed a pushup position and alternated touching two pieces of tape, 36 inches apart for 15 seconds. Thirty subjects (age 18-22) completed three trials. There was no correlation between path lengths of the conditions and CKCUEST touches. There was a significant decrease in sway over time for both conditions, but no significant difference between the two. Therefore, the Full Can exercise bout decreased sway, but vibration did not contribute to a significant difference. The InjurySway app is not a valid proprioception measure.
Honors Thesis Spring 2021
Accidents -- Prevention, Proprioception, Shoulder -- Wounds and injuries