F-38 Free Communication/Poster - Upper Extremity Mechanics: JUNE 3, 2011 1:00 PM - 6:00 PM: ROOM: Hall B
The external validity of scapular stability measures has been limited by the predominance of proprietary, custom-made laboratory devices that have not permitted direct comparisons across research settings. The reliability of a new method that measures scapular stability in more functional manner has not yet been established.
PURPOSE: To determine whether the press-up test has adequate inter-tester and inter-day reliability in overhead athletes.
METHODS: Sixteen Division III baseball players (16 men; mean age, 19.66+ 1.23 yrs) with no upper limb injury for the last 12 months participated in this study. Each subject completed his retest within 24 hours of the initial test. Intraclass correlation coefficients (ICC) were calculated for intra-rater and inter-rater using repeated measures ANOVAs for the press-up test outcome measures.
RESULTS: The ICCs for intra-rater reliability for the tester 1 (ICC=.97; 95% confidence interval [CI].91-.98 at the rest position and ICC=.95; 95% CI. 86-.98 for the press-up position) and the tester 2 (ICC=.99; 95% confidence interval [CI].97-.99 at the rest position and ICC=.98; 95% CI. 95-.99 for the press-up position) were excellent. The ICCs for inter-rater reliability of scapular winging measurement at the rest position and at the press-up position were.89 (95% CI.71-.96) and.89 (95% CI.70-.96).
CONCLUSION: The findings of this study suggest that the measurement of scapular posterior displacement during press-up test demonstrates acceptable clinical reliability. However, standardization of method is important to obtain reliable measurements in this method, as it is in any measurement method.