Evidence map›Paper›PMID 32692315›Full record

ArticleJournal of sport and health science2022

Estimates of voluntary activation in individuals with anterior cruciate ligament reconstruction: Effects of type of stimulator, number of stimuli, and quantification technique.

Steven A Garcia, Kazandra M Rodriguez, Scott R Brown, Riann M Palmieri-Smith, Chandramouli Krishnan

Open access · diamondAbstract read
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Article in Journal of sport and health science, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
0.7field-weighted citation impact, top 27% 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

6 citing papers in PubMed, 10 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 1 country.

Steven A GarciaSchool of Kinesiology, University of Michigan, Ann Arbor, MI 48109, USA.
Kazandra M RodriguezSchool of Kinesiology, University of Michigan, Ann Arbor, MI 48109, USA.
Scott R BrownNeuromuscular and Rehabilitation Robotics Laboratory (NeuRRo Lab), Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI 48108, USA.
Riann M Palmieri-SmithSchool of Kinesiology, University of Michigan, Ann Arbor, MI 48109, USA; Department of Orthopaedic Surgery, Michigan Medicine, University of Michigan, Ann Arbor, MI 48109, USA.
Chandramouli KrishnanSchool of Kinesiology, University of Michigan, Ann Arbor, MI 48109, USA; Neuromuscular and Rehabilitation Robotics Laboratory (NeuRRo Lab), Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI 48108, USA; Robotics Institute, University of Michigan, Ann Arbor, MI 48109, USA. Electronic address: mouli@umich.edu.
University of Michigan–Ann Arbor · USMichigan Medicine · US

Funding

Functional Resistance Training during Gait: A Novel Intervention to Improve Knee Function after ACL ReconstructionR21HD092614 · NICHD · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI KRISHNAN, CHANDRAMOULI, PALMIERI-SMITH, RIANN MARIE · 2017 to 2018
$428k
NICHD NIH HHS R21 HD092614
6 · The paper itself

Abstract

backgroundAccurate quantification of voluntary activation is important for understanding the extent of quadriceps dysfunction in individuals with anterior cruciate ligament reconstruction (ACLR). Voluntary activation has been quantified using both percent activation derived from the interpolated twitch technique and central activation ratio (CAR) derived from the burst superimposition technique, as well as by using different types of electrical stimulators and pulse train conditions. However, it is unclear how these parameters affect voluntary activation estimates in individuals with ACLR. This study was performed to fill this important knowledge gap in the anterior cruciate ligament literature.

methodsQuadriceps strength and voluntary activation were examined in 18 ACLR participants (12 quadriceps/patellar tendon graft, 6 hamstring tendon graft; time since ACLR: 1.06 ± 0.82 years, mean ±  SD) at 90° of knee flexion using 2 stimulators (Digitimer and Grass) and pulse train conditions (3-pulse and 10-pulse). Voluntary activation was quantified by calculating both CAR and percent activation.

resultsResults indicated that voluntary activation was significantly overestimated by CAR when compared with percent activation (p < 0.001). Voluntary activation estimates were not affected by pulse train conditions when using percent activation; however, 3-pulse stimuli resulted in greater overestimation than 10-pulse stimuli when using CAR (p = 0.003). Voluntary activation did not differ between stimulators (p > 0.05); however, the Digitimer evoked greater torque at rest than the Grass (p < 0.001).

conclusionThese results indicate that percent activation derived from the interpolated twitch technique provides superior estimates of voluntary activation than CAR derived from burst superimposition and is less affected by pulse train conditions or stimulators in individuals with ACLR.

Indexed as

Anterior Cruciate Ligament InjuriesAnterior Cruciate Ligament ReconstructionHamstring MusclesHumansQuadriceps MuscleTorqueAnterior cruciate ligamentCentral activationInhibitionKnee strengthTripletTwitch interpolation

Identifiers

PMID32692315
PMCPMC8847978
OpenAlexW2995728327

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.