Sex-independent and dependent effects of older age on cycle-to-cycle variability of muscle activation during gait

Bailey, Christopher A.; Porta, Micaela; Pilloni, Giuseppina; Arippa, Federico; Pau, Massimiliano; Côté, Julie N.

doi:10.1016/j.exger.2019.110656

Cited by 7 publications

(3 citation statements)

References 34 publications

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“…Our findings could be amplified in older adults, as healthy males and females aged 73.4 ± 4.7 years adapted less and more slowly to asymmetric gait induced by a split-belt treadmill than young adults (Bruijn et al, 2012). With healthy older age also associated with changes in gait asymmetry overground (Aboutorabi et al, 2016) and altered magnitude of variability in lower limb joint angles and muscle activation amplitude (Bailey et al, 2019, 2020), asymmetry may be a potential mechanism contributing to age-related adjustments in motor variability during gait.…”

Section: Discussionmentioning

confidence: 99%

“…Since arm swing amplitude was manipulated by artificial conditions that maintained swing cadence but decreased interlimb coordination (Hill and Nantel, 2019), future investigations may wish to explore effects of more natural variations in arm swing amplitude between individuals using a correlation approach. Finally, males and females were grouped together for sufficient statistical power; given evidence of some differences in motor variability patterns of males and females during gait (Bailey et al, 2019(Bailey et al, , 2020, further work is needed to examine how sex influences arm swing and asymmetry-related adjustments in motor variability.…”

Section: Limitationsmentioning

confidence: 99%

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Effects of arm swing amplitude and lower limb asymmetry on motor variability patterns during treadmill gait

Bailey

Hill

Graham

et al. 2021

Preprint

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Motor variability is a fundamental feature of gait. Altered arm swing and lower limb asymmetry (LLA) may be contributing factors having been shown to affect the magnitude and dynamics of variability in spatiotemporal and trunk motion. However, the effects on lower limb joints remain unclear. Full-body kinematics of 15 healthy young adults were recorded during treadmill walking using the Computer-Assisted Rehabilitation Environment system. Participants completed six trials, combining three arm swing (AS) amplitude (normal, active, held) and two LLA (symmetrical, asymmetrical) conditions. The mean standard deviation (meanSD), maximum Lyapunov exponent (λmax), detrended fluctuation analysis scaling exponent of range of motion (DFAα), and sample entropy (SaEn) were computed for tridimensional trunk, pelvis, and lower limb joint angles, and compared using repeated-measures ANOVAs. Relative to normal AS, active AS increased meanSD of all joint angles, λmax of frontal plane hip and ankle angles, and SaEn of sagittal plane ankle angles. Active AS, however, did not affect λmax or SaEn of trunk or pelvis angles. LLA increased meanSD of sagittal plane joint angles, λmax of Euclidean norm trunk angle and of lower limb joint angles, and SaEn of ankle dorsiflexion/ plantarflexion, but decreased SaEn of tridimensional trunk angles and hip rotation in the slower moving leg. Alterations in lower limb variability with active AS and LLA suggest that young adults actively exploit their lower limb redundancies to maintain gait. This appears to preserve trunk stability and regularity during active AS but not during LLA.

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Section: Discussionmentioning

confidence: 99%

Section: Limitationsmentioning

confidence: 99%

Effects of arm swing amplitude and lower limb asymmetry on motor variability patterns during treadmill gait

Bailey

Hill

Graham

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…While gait patterns are cyclical and typically characterized by low variability in healthy individuals [4,5], an implication of those challenges is that some inter-stride variability may represent a healthy state of being [6]. The parameters of three-dimensional (3D) kinematic data are useful, since they match precisely the clinical definition of the limb segments interconnected by joints [7].…”

Section: Introductionmentioning

confidence: 99%

Gait Asymmetry Comparison between Subjects with and without Nonspecific Chronic Low Back Pain

Lee

Sung

2021

Symmetry

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Individuals with chronic low back pain (LBP) report impaired somatosensory function and balance. However, there is a lack of investigation on limb motion similarities between subjects with and without LBP during gait. The aim of this study was to compare gait parameters as well as combined limb motions using the kinematic similarity index (KSI) between subjects with and without LBP. Twenty-two subjects with LBP and 19 age- and body mass index-matched control subjects participated in this study. The combined limb motions in the gait cycle of subjects with LBP were compared with those of a prototype derived from healthy subjects. The calculations resulted in response vectors that were analyzed in comparison to control-derived prototype response vectors for the normalized index at 5% increments in the gait cycle. The results of our study indicated that the KSI of the control group demonstrated higher similarities in the swing (t = 4.23, p = 0.001) and stance (t = 6.26, p = 0.001) phases compared to the LBP group. The index for the whole gait cycle was significantly different between the groups (t = 6.52, p = 0.001), especially in the midstance and swing phases. The LBP group could have adjusted the gait patterns during these specific phases. The KSI is useful for clinical outcome measures to differentiate kinematic changes and to demonstrate quantified similarities in the gait cycle between subjects with and without LBP. It is warranted to validate the KSI for the analysis of physiological gait asymmetry using a larger sample in future studies.

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Does variability in motor output at individual joints predict stride time variability in gait? Influences of age, sex, and plane of motion

Bailey

Porta

Pilloni

et al. 2020

Journal of Biomechanics

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Sex-independent and dependent effects of older age on cycle-to-cycle variability of muscle activation during gait

Abstract: et al., Sex-independent and dependent effects of older age on cycle-to-cycle variability of muscle activation during gait, Experimental Gerontology,

Cited by 7 publications

References 34 publications

Effects of arm swing amplitude and lower limb asymmetry on motor variability patterns during treadmill gait

Effects of arm swing amplitude and lower limb asymmetry on motor variability patterns during treadmill gait

Gait Asymmetry Comparison between Subjects with and without Nonspecific Chronic Low Back Pain

Does variability in motor output at individual joints predict stride time variability in gait? Influences of age, sex, and plane of motion

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