Evidence map›Paper›PMID 25962378›Full record

ArticleMedical engineering & physics2015

Achilles tendon displacement patterns during passive stretch and eccentric loading are altered in middle-aged adults.

Laura Chernak Slane, Darryl G Thelen

Open access · greenAbstract readComparative Study
In one paragraph

Article in Medical engineering & physics, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed
7.1field-weighted citation impact, top 2% 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

37 citing papers in PubMed, 77 citations in OpenAlex.

  1. Objective Assessment of Regional Stiffness in Achilles Tendon in Different Ankle Joint Positions Using the MyotonPRO.Medical science monitor : international medical journal of experimental and clinical research · 2020
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  8. Achilles tendon and triceps surae muscle properties in athletes.European journal of applied physiology · 2024
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  12. Review
  13. Advanced Robotics to Address the Translational Gap in Tendon Engineering.Cyborg and bionic systems (Washington, D.C.) · 2022
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

2 authors at 1 institution in 1 country.

Laura Chernak SlaneDepartment of Biomedical Engineering, 1550 Engineering Drive, Madison, WI 53706, United States. Electronic address: laura.c.slane@gmail.com.
Darryl G ThelenDepartment of Biomedical Engineering, 1550 Engineering Drive, Madison, WI 53706, United States; Department of Mechanical Engineering, 1513 University Ave, Madison, WI 53706, United States; Department of Orthopedics and Rehabilitation, 1300 University Ave, Madison, WI 53706, United States. Electronic address: thelen@engr.wisc.edu.
University of Wisconsin–Madison · US

Funding

Biocomputation of the Links Between Muscle Morphology, Coordination and InjuryR01AR056201 · NIAMS · UNIVERSITY OF WISCONSIN-MADISON · PI BLEMKER, SILVIA SALINAS, THELEN, DARRYL G · 2007 to 2010
$1.3M
Ultrasonic analysis of the effects of aging on tendon mechanicsF31AG043216 · NIA · UNIVERSITY OF WISCONSIN-MADISON · PI SLANE, LAURA A · 2012 to 2013
$55k
NIAMS NIH HHS R01 AR056201NIAMS NIH HHS R01AR056201NIA NIH HHS F31 AG043216NIA NIH HHS F31AG043216
6 · The paper itself

Abstract

The purpose of this study was to investigate middle-age effects on Achilles displacement patterns under passive stretch and eccentric loading. Healthy young (24.1 ± 1.4 years, n = 9) and middle-aged (49.0 ± 3.1 years, n = 9) adults were positioned prone and the ankle was cyclically dorsiflexed (0.5 Hz, 25° range) during passive stretch and active lengthening. Achilles displacements were tracked in cine ultrasound using 2D speckle tracking. Displacements were found to be non-uniform, with mid and deep portions of the tendon displacing more than superficial portions. However, the degree of non-uniformity was significantly reduced in middle-aged adults, suggesting a potential age-related reduction in inter-fascicle sliding or a shift in loading sharing between plantarflexors. Eccentric loading reduced displacement magnitudes, likely reflecting distal tendon stretch induced via active muscle contractions. Changes in tendon displacement with active loading were greater in middle-aged adults, which could reflect greater tendon compliance. The observed age-related changes in Achilles tendon behavior may have implications for both plantarflexor performance and injury risk.

Indexed as

Achilles TendonAgingAnkle JointBiomechanical PhenomenaFemaleHumansMaleMiddle AgedMovementOrgan SizeRange of Motion, ArticularUltrasonographyYoung AdultNon-uniform motionUltrasound speckle tracking

Identifiers

PMID25962378
PMCPMC4478106
OpenAlexW2146103262

What OpenQuestion holds

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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.