Abstract：
:The aim of this pilot study was to evaluate concurrent validity and intrasession reliability of the IDEEA (Minisun, Fresno, CA) accelerometry system (and associated software) with force plate measurements for spatiotemporal gait variables recorded during normal walking. Ten healthy individuals were asked to walk at a self-selected comfortable speed, over five multicomponent force plates embedded into the walkway floor. For each trial, spatiotemporal gait parameters (single support time, cadence, speed, step and stride length) obtained by the force plates were compared to those recorded by IDEEA. Concurrent (criterion-related) validity between the two systems was analysed with intraclass correlation (ICC) (2,1). Intrasession reliability was quantified by using coefficient of variations (CV) and ICC. For the ensemble of the parameters, ICC (2,1) ranged between 0.998 (cadence) and 0.784 (step length right) (p<0.001-0.01). However, speed, step length and stride length were significantly lower for IDEEA (~7%; p<0.001) compared to force plate data. Intrasession reliability of IDEEA was excellent, with CV lower than 5.7 and ICC higher than 0.961. The present accelerometry system demonstrated strong concurrent validity for the assessment of spatiotemporal gait parameters. However, spatial variables (stride and step length) and walking speed were significantly underestimated compared with analyses using force plates.
journal_name
Gait Posturejournal_title
Gait & postureauthors
Maffiuletti NA,Gorelick M,Kramers-de Quervain I,Bizzini M,Munzinger JP,Tomasetti S,Stacoff Adoi
10.1016/j.gaitpost.2007.01.003subject
Has Abstractpub_date
2008-01-01 00:00:00pages
160-3issue
1eissn
0966-6362issn
1879-2219pii
S0966-6362(07)00030-6journal_volume
27pub_type
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