Evidence map›Paper›PMID 33344976›Full record

ArticleFrontiers in sports and active living2019

Humans Optimize Ground Contact Time and Leg Stiffness to Minimize the Metabolic Cost of Running.

Isabel S Moore, Kelly J Ashford, Charlotte Cross, Jack Hope, Holly S R Jones, Molly McCarthy-Ryan

Abstract read
In one paragraph

Article in Frontiers in sports and active living, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed, 4 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

36 citing papers in PubMed, 4 syntheses or guidelines pooled it.

  1. Pooled it
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  10. Use of the STRYDSports (Basel, Switzerland) · 2026
    Review
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  15. Physiological Resilience: What Is It and How Might It Be Trained?Scandinavian journal of medicine & science in sports · 2025
    Review
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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.

Isabel S MooreCardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom.
Kelly J AshfordCardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom.
Charlotte CrossCardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom.
Jack HopeCardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom.
Holly S R JonesCardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom.
Molly McCarthy-RyanCardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Trained endurance runners appear to fine-tune running mechanics to minimize metabolic cost. Referred to as self-optimization, the support for this concept has primarily been collated from only a few gait (e.g., stride frequency, length) and physiological (e.g., oxygen consumption, heart rate) characteristics. To extend our understanding, the aim of this study was to examine the effect of manipulating ground contact time on the metabolic cost of running in trained endurance runners. Additionally, the relationships between metabolic cost, and leg stiffness and perceived effort were examined. Ten participants completed 5 × 6-min treadmill running conditions. Self-selected ground contact time and step frequency were determined during habitual running, which was followed by ground contact times being increased or decreased in four subsequent conditions whilst maintaining step frequency (2.67 ± 0.15 Hz). The same self-selected running velocity was used across all conditions for each participant (12.7 ± 1.6 km · h

Indexed as

oxygen consumptionperceived effortrunning economyrunning mechanicsself-optimization

Identifiers

PMID33344976
PMCPMC7739683

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.