Evidence map›Paper›PMID 27473447›Full record

ArticleEuropean journal of applied physiology2016

Does knee joint cooling change in vivo patellar tendon mechanical properties?

Luis M Alegre, Michael Hasler, Sebastian Wenger, Werner Nachbauer, Robert Csapo

Open access · hybridAbstract read
In one paragraph

Article in European journal of applied physiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
1.9field-weighted citation impact, top 16% 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, 27 citations in OpenAlex.

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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

5 authors at 2 institutions in 2 countries.

Luis M AlegreGENUD Toledo Research Group, University of Castilla-La Mancha, Avda. Carlos III s/n, 45071, Toledo, Spain.
Michael HaslerCentre of Technology of Ski and Alpine Sport, Fürstenweg 187, Innsbruck, Austria.
Sebastian WengerCentre of Technology of Ski and Alpine Sport, Fürstenweg 187, Innsbruck, Austria.
Werner NachbauerDepartment of Sport Science, University of Innsbruck, Fürstenweg 185, Innsbruck, Austria.
Robert CsapoDepartment of Sport Science, University of Innsbruck, Fürstenweg 185, Innsbruck, Austria. robert.csapo@uibk.ac.at.
Universität Innsbruck · ATUniversity of Castilla-La Mancha · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThis study aimed to assess the influence of knee joint cooling on the in vivo mechanical properties of the patellar tendon.

methodsTwenty young, healthy women volunteered for the study. B-mode ultrasonography was used to record patellar tendon elongation during isometric ramp contraction of the knee extensors (5-7 s, 90° knee angle) and calculate tendon stiffness. Skin temperature was measured by infrared thermometry. Data were acquired before and after 30 min of local icing of the knee joint and compared by paired samples t-tests.

resultsAfter cold exposure, skin temperature as measured over the patellar tendon dropped by 16.8 ± 2.0 °C. Tendon stiffness increased from 2189 ± 551 to 2705 ± 902 N mm(-1) (+25 %, p = 0.007). Tendon strain decreased by 9 % (p = 0.004). A small, albeit significant reduction in maximum tendon force was observed (-3.3 %, p = 0.03).

conclusionsKnee cooling is associated with a significant increase in patellar tendon stiffness. The observed tendon stiffening may influence the operating range of sarcomeres, possibly limiting the maximal force generation capacity of knee extensor muscles. In addition, a stiffer tendon might benefit rate of force development, thus countering the loss in explosiveness typically described for cold muscles.

Indexed as

Body TemperatureCold TemperatureElastic ModulusFemaleHumansHypothermia, InducedKnee JointMuscle ContractionPatellar LigamentReproducibility of ResultsSensitivity and SpecificitySkin TemperatureStress, MechanicalTensile StrengthUltrasonographyYoung AdultCryotherapyMaterial propertiesTendon deformationUltrasonography

Identifiers

PMID27473447
PMCPMC5020126
OpenAlexW2475881491

What OpenQuestion holds

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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.