Evidence map›Paper›PMID 31150452›Full record

ArticlePloS one2019

Does variability of footfall kinematics correlate with dynamic stability of the centre of mass during walking?

Niklas König Ignasiak, Deepak K Ravi, Stefan Orter, Seyyed Hamed Hosseini Nasab, William R Taylor, Navrag B Singh

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
4.5field-weighted citation impact, top 6% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

11 citing papers in PubMed, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Foot placement coordination is impaired in people with Parkinson's disease.Journal of neuroengineering and rehabilitation · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 2 countries.

Niklas König IgnasiakInstitute for Biomechanics, ETH Zürich, Leopold-Ruzicka-Weg 4, Zurich, Switzerland.ORCID 0000-0001-9065-3344
Deepak K RaviInstitute for Biomechanics, ETH Zürich, Leopold-Ruzicka-Weg 4, Zurich, Switzerland.
Stefan OrterInstitute for Biomechanics, ETH Zürich, Leopold-Ruzicka-Weg 4, Zurich, Switzerland.
Seyyed Hamed Hosseini NasabInstitute for Biomechanics, ETH Zürich, Leopold-Ruzicka-Weg 4, Zurich, Switzerland.
William R TaylorInstitute for Biomechanics, ETH Zürich, Leopold-Ruzicka-Weg 4, Zurich, Switzerland.
Navrag B SinghInstitute for Biomechanics, ETH Zürich, Leopold-Ruzicka-Weg 4, Zurich, Switzerland.
ETH Zurich · CHChapman University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

A stable walking pattern is presumably essential to avoid falls. Stability of walking is most accurately determined by the short-term local dynamic stability (maximum Lyapunov exponent) of the body centre of mass. In many studies related to fall risk, however, variability of step width is considered to be indicative of the stability of the centre of mass during walking. However, other footfall parameters, in particular variability of stride time, have also been associated with increased risk for falling. Therefore, the aim of this study was to investigate the association between short-term local dynamic stability of the body centre of mass and different measures of footfall variability. Twenty subjects performed unperturbed walking trials on a treadmill and under increased (addition of 40% body weight) and decreased (harness system) demands to stabilise the body centre of mass. Association between stability of the centre of mass and footfall parameters was established using a structural equation model. Walking with additional body weight lead to greater instability of the centre of mass and increased stride time variability, however had no effect on step width variability. Supported walking in the harness system did not increase centre of mass stability further, however, led to a significant decrease of step width and increase in stride time variability. A structural equation model could only predict 8% of the variance of the centre of mass stability after variability of step width, stride time and stride length were included. A model which included only step width variability as exogenous variable, failed to predict centre of mass stability. Because of the failure to predict centre of mass stability in this study, it appears, that the stability of the centre of mass is controlled by more complex interaction of sagittal and frontal plane temporal and spatial footfall parameters, than those observed by standard variability measures. Anyway, this study does not support the application of step width variability as indicator for medio-lateral stability of the centre of mass during walking.

Indexed as

AdultBiomechanical PhenomenaFemaleFootGaitHealthy VolunteersHumansMaleModels, BiologicalPostural BalanceSpatio-Temporal AnalysisYoung Adult

Identifiers

PMID31150452
PMCPMC6544240
OpenAlexW2947368415

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.