Open Collections

Keep, H.; Berson, A.; Luu, L.; Ivanova, T. D.; Garland, S. J.

Study Design: Cross-sectional study. Background: Muscle imbalances at the hip have been linked to a variety of musculoskeletal conditions. To assess these imbalances, a valid, reliable, and cost-effective means of measuring strength is needed. Handheld dynamometers (HHD) are used to obtain objective measures of muscle strength, however, to date there is limited information on the validity of the HHD in measuring peak hip extension strength. Objectives: To establish the minimal detectable change (MDC) for hip extension, to evaluate the validity of the HHD in measuring peak hip extension torque compared to the Biodex dynamometer and to determine the validity of taking single- versus multi-trial measures. Materials & Methods: A convenience sample of 20 healthy adults was recruited. Peak hip extension strength measures were collected in a prone standing position for the HHD and Biodex. The supine position on the Biodex was used also as a comparison. Analysis: MDC was assessed using the standard error of measure. Linear regression analysis was used to compare HHD, Biodex Prone and Biodex Supine peak torque measures for concurrent validity and Pearson product moment correlation coefficients (r) were used to determine the validity of first trial versus three trial average measures. Results: The MDC was 14.8Nm for the HHD, 25.6Nm for Biodex Prone and 41.5Nm for Biodex Supine. The r values were 0.37 (p≤0.05) for HHD vs. Biodex Prone Standing, 0.51 (p≤0.0001) for HHD vs. Biodex Supine and 0.55 (p≤0.0001) for Biodex Prone Standing vs. Supine. High correlations (r = 0.94, p < 0.0001) were observed between trial one compared to three trial averages. Conclusions: The MDC for hip extension strength is smallest using the HHD . The HHD in the prone standing position has moderate concurrent validity in measuring peak hip extension strength in healthy adults aged 20-53. Single trial measures with the HHD have high correlations with three trial average values and therefore may be clinically appropriate.

Graduating Project

eng

2013-09-27

Attribution-NonCommercial-NoDerivs 2.5 Canada

http://hdl.handle.net/2429/45134

UBCV

Graduate

DSpace