Evidence map›Paper›PMID 30109503›Full record

ArticleEuropean journal of applied physiology2018

Hamstring stiffness pattern during contraction in healthy individuals: analysis by ultrasound-based shear wave elastography.

Bruno Mendes, Telmo Firmino, Raúl Oliveira, Tiago Neto, Jorge Infante, João R Vaz, Sandro R Freitas

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Article in European journal of applied physiology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 1 pooled it
2.6field-weighted citation impact, top 12% 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

28 citing papers in PubMed, 1 synthesis or guideline pooled it, 58 citations in OpenAlex.

  1. Pooled it
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  5. The test-induced warm-up effect on hamstring flexibility tests.Hong Kong physiotherapy journal : official publication of the Hong Kong Physiotherapy Association Limited = Wu li chih liao · 2024
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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

7 authors at 2 institutions in 3 countries.

Bruno MendesFaculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, Dafundo, 1499-002, Lisboa, Portugal.ORCID http://orcid.org/0000-0002-3206-2711
Telmo FirminoFaculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, Dafundo, 1499-002, Lisboa, Portugal.ORCID http://orcid.org/0000-0003-1445-7514
Raúl OliveiraFaculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, Dafundo, 1499-002, Lisboa, Portugal.ORCID http://orcid.org/0000-0001-9750-0527
Tiago NetoFaculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, Dafundo, 1499-002, Lisboa, Portugal.ORCID http://orcid.org/0000-0001-6696-5372
Jorge InfanteFaculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, Dafundo, 1499-002, Lisboa, Portugal.
João R VazFaculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, Dafundo, 1499-002, Lisboa, Portugal.ORCID http://orcid.org/0000-0001-9691-5456
Sandro R FreitasFaculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, Dafundo, 1499-002, Lisboa, Portugal. sfreitas@fmh.ulisboa.pt.ORCID http://orcid.org/0000-0002-9760-5350
University of Lisbon · PTUniversity of Nebraska at Omaha · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo assess the stiffness of hamstring muscles during isometric contractions in healthy individuals, using ultrasound-based shear wave elastography to (1) determine the intra- and inter-day assessment repeatability, (2) characterize the stiffness of semitendinosus (ST) and biceps femoris long head (BFlh) along the contraction intensity, and (3) characterize stiffness distribution among the hamstring muscles and inter-limb symmetry.

methodsTwo experiments were conducted. In experiment I (n = 12), the intra-day repeatability in assessing the BFlh and ST stiffness were determined at intensities between 10-60% of maximal voluntary isometric contraction (MVIC) in a single session. In experiment II (n = 11), the stiffness of the hamstring muscles of both thighs was assessed at 20% of MVIC in the first session; and retested (for one randomly chosen thigh) in a second session. Isometric contraction of knee flexors was performed with the knee flexed at 30° and with the hip in a neutral position.

resultsModerate-to-very-high intra- and inter-day repeatability was found (ICC = 0.69-0.93). The BFlh/ST stiffness ratio increased with contraction intensity. At 20% of MVIC, the ST showed the highest stiffness among the hamstring muscles (p < 0.02), with no differences between the remaining hamstring muscles (p > 0.474). No differences were found between limbs (p = 0.12).

conclusionsThe stiffness distribution among the hamstring muscles during submaximal isometric contractions is heterogeneous, but symmetric between limbs, and changes depending on the contraction intensity. Shear wave elastography is a reliable tool to assess the stiffness of hamstring muscles during contraction.

Indexed as

AdolescentAdultElasticity Imaging TechniquesElectromyographyFemaleHamstring MusclesHumansIsometric ContractionKnee JointMaleMuscle ContractionRange of Motion, ArticularTorqueYoung AdultBiceps femoris short headSemitendinosusShear modulusSkeletal muscleSurface EMG

Identifiers

PMID30109503
OpenAlexW2887270508

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.