Effect of Leg Length Discrepancy on Dynamic Gait Stability

Miyagi, Issei; Ohta, Mizuho; Tamari, Makoto

doi:10.2490/prm.20230013

Cited by 3 publications

(2 citation statements)

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“…These variations in the duration of consecutive gait cycles contributed to no more than a 1.0% increase in stride time and a 1.0% decrease in cadence during locomotion at 3 cm LLD compared to no-LLD (Figure 7). The decrease in SLS step length compared to LLS step length as well, as the minimal albeit significant changes in stride length found in the present study during treadmill walking, were supported by previously recorded data on an instrumented treadmill [57] as well as during overground walking in subjects with either artificially induced LLD [58,59] or anatomical LLD of ≥2 cm [40]. In accordance with our findings, step width has also been found to be increased as LLD increased, with some authors detecting significant differences in subjects with artificially induced LLD of 2 cm during treadmill walking [57] but not with 3 cm LLD during overground walking [59].…”

Section: Effects Of Lld On Spatiotemporal Gait Parameterssupporting

confidence: 91%

“…The decrease in SLS step length compared to LLS step length as well, as the minimal albeit significant changes in stride length found in the present study during treadmill walking, were supported by previously recorded data on an instrumented treadmill [57] as well as during overground walking in subjects with either artificially induced LLD [58,59] or anatomical LLD of ≥2 cm [40]. In accordance with our findings, step width has also been found to be increased as LLD increased, with some authors detecting significant differences in subjects with artificially induced LLD of 2 cm during treadmill walking [57] but not with 3 cm LLD during overground walking [59]. In addition, previous studies performed in subjects with artificially induced LLD up to 3 cm during treadmill walking confirmed the increased SLS step time compared to LLS step time, and the minor changes in stride time among LLDs [57] found in the present study.…”

Section: Effects Of Lld On Spatiotemporal Gait Parameterssupporting

confidence: 91%

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Effects of Artificially Induced Leg Length Discrepancy on Treadmill-Based Walking and Running Symmetry in Healthy College Students: A Lab-Based Experimental Study

Korontzi,

Kafetzakis,

Mandalidis

2023

Sensors

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Leg length discrepancy (LLD) is a common postural deviation of musculoskeletal origin, which causes compensatory reactions and often leads to injury. The aim of the study was to investigate the effect of artificially induced LLD on gait symmetry by means of the spatiotemporal gait parameters and ground reaction forces (GRFs) using a treadmill equipped with capacitive sensors (instrumented) as well as the EMG activity of trunk and hip muscles during walking and running. Twenty-six healthy male and female college students were required to perform two sets of four 2.5-min walking and running trials on an instrumented treadmill at 5.6 and 8.1 km·h−1, respectively, without (0) and with 1, 2, and 3 cm LLD implemented by wearing a special rubber shoe. Statistical analysis was performed using one-way repeated measures or a mixed-design ANOVA. Most spatiotemporal gait parameters and GRFs demonstrated an increase or decrease as LLD increased either on the short-limb or the long-limb side, with changes becoming more apparent at ≥1 cm LLD during walking and ≥2 cm LLD during running. The EMG activity of trunk and hip muscles was not affected by LLD. Our findings showed that gait symmetry in terms of treadmill-based spatiotemporal parameters of gait and GRFs is affected by LLD, the magnitude of which depends on the speed of locomotion.

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