Evidence map›Paper›PMID 34115525›Full record

ArticleThe American journal of sports medicine2021

Functional Ankle Range of Motion but Not Peak Achilles Tendon Force Diminished With Heel-Rise and Jumping Tasks After Achilles Tendon Repair.

Jennifer A Zellers, Josh R Baxter, Karin Grävare Silbernagel

Abstract read
In one paragraph

Article in The American journal of sports medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
–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

8 citing papers in PubMed.

  1. Article
  2. Article
  3. Achilles Tendon Surgical Repair Partially Restores Early Plantar Flexor Structure and Function in a Rat Model.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2025
    Article
  4. Article
  5. Rehabilitation and Return to Sports after Achilles Tendon Repair.International journal of sports physical therapy · 2024
    Article
  6. Review
  7. Review
  8. Article
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

3 authors.

Jennifer A ZellersProgram in Physical Therapy, Washington University School of Medicine in St Louis, St Louis, Missouri, USA.
Josh R BaxterDepartment of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA.ORCID 0000-0003-0269-2170
Karin Grävare SilbernagelDepartment of Physical Therapy, University of Delaware, Newark, Delaware, USA.ORCID 0000-0001-7566-407X

Funding

Recovery of symptoms, function, tendon structure and mechanical properties in patients with Achilles Tendinopathy: A comparison between men and womenR01AR072034 · NIAMS · UNIVERSITY OF DELAWARE · PI GRAVARE SILBERNAGEL, KARIN M E · 2018 to 2022
$2.5M
Modifying muscle remodeling following Achilles tendon rupturesK01AR075877 · NIAMS · UNIVERSITY OF PENNSYLVANIA · PI BAXTER, JOSH · 2020 to 2024
$609k
Diabetes-related Tendon Changes: Integrating Ex Vivo and In Vivo ApproachesF32DK123916 · NIDDK · WASHINGTON UNIVERSITY · PI ZELLERS, JENNIFER · 2019 to 2020
$127k
NIAMS NIH HHS K01 AR075877NIAMS NIH HHS R01 AR072034NIDDK NIH HHS F32 DK123916
6 · The paper itself

Abstract

backgroundDeficits in sporting performance after Achilles tendon repair may be due to changes in musculotendinous unit structure, including tendon elongation and muscle fascicle shortening. PURPOSE/HYPOTHESIS: The purpose was to discern whether Achilles tendon rupture reduces triceps surae muscle force generation, alters functional ankle range of motion, or both during sports-related tasks. We hypothesized that individuals who have undergone Achilles tendon repair lack the functional ankle range of motion needed to complete sports-related tasks. STUDY

designDescriptive laboratory study.

methodsThe study included individuals 1 to 3 years after treatment of Achilles tendon rupture with open repair. Participants (n = 11) completed a heel-rise task and 3 jumping tasks. Lower extremity biomechanics were analyzed using motion capture. Between-limb differences were tested using paired

resultsPelvic vertical displacement was reduced during the heel-rise (mean difference, -12.8%;

conclusionImpaired task performance or increased demands on proximal joints were observed on the repaired side in tasks isolating ankle function. Tasks that did not isolate ankle function appeared to be well recovered, although functional ankle range of motion was reduced with rupture. Reduced plantar flexor muscle-tendon unit work supports previous reports that an elongated tendon and shorter muscle fascicles caused by Achilles tendon rupture constrain functional capacity. Achilles tendon peak load and impulse were not decreased, suggesting that reduced and shifted functional ankle range of motion (favoring dorsiflexion) underlies performance deficits. CLINICAL RELEVANCE: These findings point to the need to reduce tendon elongation and restore muscle length of the triceps surae after Achilles tendon rupture in order to address musculature that is short but not necessarily weak for improved performance with sports-related activities.

Indexed as

Achilles TendonAnkleAnkle JointHeelHumansMuscle, SkeletalRange of Motion, ArticularRupturebiomechanicsrehabilitationreturn to playsports performance

Identifiers

PMID34115525
PMCPMC8282709

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.