Comparison of Isometric Portable Fixed Dynamometry to Isokinetic Dynamometry for Assessment of Hip Strength

摘要

Context: Assessment of hip strength can be performed with either isokinetic or isometric testing procedures, but the degree of association between values derived from the alternative testing methods has not been previously documented. Objective: To investigate the relationship between isometric peak torque and isokinetic peak torque at 60deg ?s-1 for various hip motions. Participants: Eighteen physically active males (N = 9) and females (N = 9) participated (22 +- 3 years, 173.0 +- 10.5 cm, 73.8 + 16.7 kg). Intervention(s): Three isokinetic repetitions at 60deg ? s-1 and three isometric contractions of 5 s each for the hip flexors (HFs), hip extensors (HEs), hip abductors (ABs), hip adductors (ADs), hip external rotators (ERs), and hip internal rotators (IRs). Outcome Measures: Pearson correlation coefficients and coefficients of determination were calculated for both absolute and allometric-scaled peak torque values. Results: Meaningful associations between isometric and isokinetic peak torque values were found for each hip motion. Allometric-scaled strength values demonstrated stronger correlations than absolute strength values. Conclusions: The results suggest that portable fixed isometric testing of hip strength is an alternative to isokinetic testing at 60deg?s-1.