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Pubmed for Handhelds

PUBMED FOR HANDHELDS

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  • Title: Reliability and validity of trunk flexor and trunk extensor strength measurements using handheld dynamometry in a healthy athletic population.
    Author: De Blaiser C, De Ridder R, Willems T, Danneels L, Roosen P.
    Journal: Phys Ther Sport; 2018 Nov; 34():180-186. PubMed ID: 30366246.
    Abstract:
    OBJECTIVES: To investigate reliability and validity of handheld dynamometry (HHD) strength tests to accurately measure isometric trunk flexion and extension strength. DESIGN: Test-retest design and comparative analysis to investigate reliability and validity respectively. SETTING: Isometric trunk flexion and extension strength, measured with a handheld dynamometer, was compared to isometric strength testing on a stationary isokinetic dynamometer. Different test positions were examined for the HHD measurements for trunk flexion and extension strength. MAIN OUTCOME MEASURES: Trunk muscle strength was calculated in newton metres (Nm) for both devices. Results of both devices were compared with Pearson correlations and agreement between both methods was explored with Bland-Altman plots. ICC values were calculated to assess HHD intra- and inter-tester reliability. RESULTS: Reliability was good to excellent for all HHD tests (ICC = 0.67-0.93). High correlations were found between the HHD tests and stationary dynamometer tests (r = 0.65-0.86). Bland-Altman plots showed agreement between both methods for the trunk flexion test, supported in 30° trunk flexion and for the trunk extension test in a prone position in 0° trunk flexion. CONCLUSION: Handheld dynamometry is reliable and a clinically applicable valid method to evaluate isometric trunk flexion and extension strength.
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