Effects of gait speed on the body’s center of mass motion relative to the center of pressure during over-ground walking

Lu, Hsuan-Lun; Kuo, Mei‐Ying; Chang, Chi‐Fon; Lu, Tung‐Wu; Hong, Shih-Wun

doi:10.1016/j.humov.2017.06.004

Cited by 15 publications

(26 citation statements)

References 41 publications

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“…The third hypothesis was supported since the results showed that DGS decreased with increasing gait velocity under both the MT and CT paradigms. Two previous studies published by our group reported that IA was increased under a relatively faster velocity condition during over-ground [18] and treadmill walking [20].…”

Section: Discussionmentioning

confidence: 73%

“…Increased COM, COP displacement, and COM-COP separation were all interpreted as a decrease of DGS during stair descent [14,16,17]. COM-COP inclination angle (IA), formed by the vertical line and the projection of the vector onto the sagittal and frontal planes [18], was proposed to provide a more comprehensive assessment than the examination of COM or COP [19]. IA can better represent instability than COM or COP measures [19] and better include the influence of leg length or body height than COM-COP horizontal separation [20].…”

Section: Introductionmentioning

confidence: 99%

“…Even the ones that considered velocity reported conflicting results. reported that the velocity increase associated with young adults could cause a significant increase in IA [18], while Chien et al (2013) considered that gait velocity did not impose a limitation on the interpretation of the IA [21]. Although IA may change with changes in gait velocity and dual-task performance, few studies examined the association among gait velocity, dual-task performance, and IA.…”

Section: Introductionmentioning

confidence: 99%

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Effects of a Dual-Task Paradigm and Gait Velocity on Dynamic Gait Stability during Stair Descent

et al. 2020

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Falls during stair negotiation have become one of the leading causes of accidental death. The effects of a concurrent cognitive or manual dual-task paradigm on dynamic gait stability remain uncertain. How much dynamic gait stability is influenced by gait velocity is also not clear. A total of 16 healthy young females descended a staircase under three different walking conditions: descend stairs only (single task), descend stairs while performing subtraction (cognitive dual-task), and descend stairs while carrying a glass of water (manual dual-task). An eight-camera Vicon motion analysis system and a Kistler force plate embedded into the third step of the staircase were used synchronously to collect kinematic and kinetic data. Gait velocity decreased and dynamic gait stability increased with both cognitive and manual dual-task conditions. The center of mass–center of pressure inclination angle increased with gait velocity but decreased with the manual dual-task condition compared to the single-task condition. Changes in gait velocity caused by the dual-task paradigm can partially explain the effects of dual-task dynamic gait stability. The influence of gait velocity should be considered in the assessment of dual-task effects.

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Section: Discussionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of a Dual-Task Paradigm and Gait Velocity on Dynamic Gait Stability during Stair Descent

et al. 2020

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“…A study conducted by McClymont et al showed that the mean square error, one of the variability measures, of plantar pressures significantly increased when walking faster, while the coefficient of variation, another standard variability measure, was not related to walking speed [ 43 ]. Lu et al performed a series of studies to determine the effects of different gait speeds controlled by treadmill or participants on the inclination angle of center of mass and the COP, suggesting that the minimum value of the range of the frontal inclination angle was detected at the preferred walking speed, compared to that at lower or higher speeds, either in over-ground walking or in treadmill walking [ 44 , 45 ]. These findings indicate that people might control their posture with the least effort during walking at their preferred speed.…”

Section: Discussionmentioning

confidence: 99%

Complexity-Based Measures of Postural Sway during Walking at Different Speeds and Durations Using Multiscale Entropy

Liau

Lung

et al. 2019

Entropy

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: Participation in various physical activities requires successful postural control in response to the changes in position of our body. It is important to assess postural control for early detection of falls and foot injuries. Walking at various speeds and for various durations is essential in daily physical activities. The purpose of this study was to evaluate the changes in complexity of the center of pressure (COP) during walking at different speeds and for different durations. In this study, a total of 12 participants were recruited for walking at two speeds (slow at 3 km/h and moderate at 6 km/h) for two durations (10 and 20 minutes). An insole-type plantar pressure measurement system was used to measure and calculate COP as participants walked on a treadmill. Multiscale entropy (MSE) was used to quantify the complexity of COP. Our results showed that the complexity of COP significantly decreased (p < 0.05) after 20 min of walking (complexity index, CI = −3.51) compared to 10 min of walking (CI = −3.20) while walking at 3 km/h, but not at 6 km/h. Our results also showed that the complexity index of COP indicated a significant difference (p < 0.05) between walking at speeds of 3 km/h (CI = −3.2) and 6 km/h (CI = −3.6) at the walking duration of 10 minutes, but not at 20 minutes. This study demonstrated an interaction between walking speeds and walking durations on the complexity of COP.

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“…Dynamic balance challenge increases with walking speed, and thus walking speed should be controlled when assessing dynamic balance. Research indicates that walking speed independently affects double support duration [18] and COM-COP IA [19,20]. As walking speed increases, the double support phase shortens in healthy subjects [18].…”

Section: Chapter I Introductionmentioning

confidence: 99%

The effects of hallux valgus and walking speed on dynamic balance in older adults

et al. 2020

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Hallux valgus (HV) contributes to deficits in static balance and increased fall risk in older adults. Very limited research has examined dynamic balance deficits in walking in this population. These individuals generally walk slowly, as balance challenge is lesser at slow speeds. The purpose of this study was to examine dynamic balance in older adults with HV compared to healthy controls at controlled slow and fast speeds. Nineteen older adults with HV and 13 healthy controls completed 5 continuous walking trials at 1.0 and 1.3 m•s-1 as whole body marker position and ground reaction force data were captured. Dynamic balance was evaluated using whole body center of mass (COM) and center of pressure (COP) inclination angles (IA) and duration of double support. There were no differences in measures of dynamic balance between older adults with and without HV at slow and fast speeds. At the faster speed, the peak sagittal plane COM-COP IA increased and the double support duration decreased, while the peak frontal plane COM-COP IA were not affected. Older adults with HV do not exhibit deficits in dynamic balance during continuous walking at comfortable speeds when compared to healthy older adults.

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Effects of gait speed on the body’s center of mass motion relative to the center of pressure during over-ground walking

Cited by 15 publications

References 41 publications

Effects of a Dual-Task Paradigm and Gait Velocity on Dynamic Gait Stability during Stair Descent

Effects of a Dual-Task Paradigm and Gait Velocity on Dynamic Gait Stability during Stair Descent

Complexity-Based Measures of Postural Sway during Walking at Different Speeds and Durations Using Multiscale Entropy

The effects of hallux valgus and walking speed on dynamic balance in older adults

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