Evidence map›Paper›PMID 26154285›Full record

ArticlePloS one2015

Variation in Foot Strike Patterns among Habitually Barefoot and Shod Runners in Kenya.

Daniel E Lieberman, Eric R Castillo, Erik Otarola-Castillo, Meshack K Sang, Timothy K Sigei, Robert Ojiambo, Paul Okutoyi, Yannis Pitsiladis

Abstract read
In one paragraph

Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

23 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  6. Article
  7. Which Factors Influence Running Gait in Children and Adolescents? A Narrative Review.International journal of environmental research and public health · 2023
    Review
  8. Article
  9. Barefoot Running on Grass as a Potential Treatment for Plantar Fasciitis: A Prospective Case Series.International journal of environmental research and public health · 2022
    Article
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  19. Observational
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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

8 authors.

Daniel E LiebermanDepartment of Human Evolutionary Biology, Harvard University, Cambridge, Massachusetts, United States of America.
Eric R CastilloDepartment of Human Evolutionary Biology, Harvard University, Cambridge, Massachusetts, United States of America.
Erik Otarola-CastilloDepartment of Human Evolutionary Biology, Harvard University, Cambridge, Massachusetts, United States of America.
Meshack K SangMedical Physiology Department, School of Medicine, Moi University, Eldoret, Kenya.
Timothy K SigeiDepartment of Statistics and Computer Science Moi University, Eldoret, Kenya.
Robert OjiamboMedical Physiology Department, School of Medicine, Moi University, Eldoret, Kenya.
Paul OkutoyiDepartment of Orthopaedics and Rehabilitation, School of Medicine, Moi University, Eldoret, Kenya.
Yannis PitsiladisCentre for Sport and Exercise Science and Medicine, University of Brighton, Brighton, United Kingdom.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Runners are often categorized as forefoot, midfoot or rearfoot strikers, but how much and why do individuals vary in foot strike patterns when running on level terrain? This study used general linear mixed-effects models to explore both intra- and inter-individual variations in foot strike pattern among 48 Kalenjin-speaking participants from Kenya who varied in age, sex, body mass, height, running history, and habitual use of footwear. High speed video was used to measure lower extremity kinematics at ground contact in the sagittal plane while participants ran down 13 meter-long tracks with three variables independently controlled: speed, track stiffness, and step frequency. 72% of the habitually barefoot and 32% of the habitually shod participants used multiple strike types, with significantly higher levels of foot strike variation among individuals who ran less frequently and who used lower step frequencies. There was no effect of sex, age, height or weight on foot strike angle, but individuals were more likely to midfoot or forefoot strike when they ran on a stiff surface, had a high preferred stride frequency, were habitually barefoot, and had more experience running. It is hypothesized that strike type variation during running, including a more frequent use of forefoot and midfoot strikes, used to be greater before the introduction of cushioned shoes and paved surfaces.

Indexed as

GaitRunningShoesAdolescentAdultAnthropometryAthletesBiomechanical PhenomenaFemaleFootHumansKenyaMaleReproducibility of ResultsVideo RecordingYoung Adult

Identifiers

PMID26154285
PMCPMC4495985

What OpenQuestion holds

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Registered trials

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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.