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Using the loading response peak for defining gait cycle timing: A novel solution for the double-belt problem.

Abstract：

:Split-belt treadmills (SBTM) contain force plates under each belt that measure ground reaction force (GRF). Initial contact (IC) detection for each gait cycle obtained from the GRF is used for calculating temporal gait parameters (e.g., gait variability, step time, stride time). Occasionally, the participant steps with one leg on the contralateral belt (i.e., crossing) making the IC undetectable and the calculation of temporal gait parameters are compromised. We term this the double-belt problem (DBP). OBJECTIVE:here we developed a complementary detection method using the loading response peak (LRP), anchor point for calculating gait parameters. METHODS:we used GRF gait data from twenty adults (age 56.45 ± 4.81 y; 6 males) who walked on an SBTM. First, we used no-crossing gait periods free of the DBP to calculate stride time, step time, and stride time to stride time coefficient of variation and evaluated the true error and the normalized true error of the LRP detection method. Then, we used multiple comparisons between no-crossing data and crossing data. RESULTS:we found that normalized errors (in comparison to the IC method) are ≤5.1%. Strong correlations were found between gait parameters computed based on the two detection methods (Intraclass correlation coefficient ≥0.97; p ≤ 0.001). CONCLUSION:detecting gait cycle timing based on the LRP detection method is reliable for estimating temporal gait parameters, demonstrating high correspondence with the gold standard IC detection method.

journal_name

J Biomech

journal_title

Journal of biomechanics

authors

Ben-Gal O,Benady A,Zadik S,Doniger GM,Schnaider Beeri M,Plotnik M

doi

10.1016/j.jbiomech.2020.109963

subject

Has Abstract

pub_date

2020-09-18 00:00:00

pages

109963

eissn

0021-9290

issn

1873-2380

pii

S0021-9290(20)30386-9

journal_volume

110

pub_type

杂志文章

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