Evidence map›Paper›PMID 33010748›Full record

ArticleThe Knee2020

Individual hop analysis and reactive strength ratios provide better discrimination of ACL reconstructed limb deficits than triple hop for distance scores in athletes returning to sport.

Rhodri S Lloyd, Jon L Oliver, Lucy S Kember, Gregory D Myer, Paul J Read

Open access · greenAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in The Knee, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 1 pooled it
2.2field-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

9 citing papers in PubMed, 1 synthesis or guideline pooled it, 33 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 4 institutions in 4 countries.

Rhodri S LloydYouth Physical Development Centre, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK; Sport Performance Research Institute, New Zealand (SPRINZ), AUT University, Auckland, New Zealand; Centre for Sport Science and Human Performance, Waikato Institute of Technology, Hamilton, New Zealand. Electronic address: rlloyd@cardiffmet.ac.uk.
Jon L OliverYouth Physical Development Centre, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK; Sport Performance Research Institute, New Zealand (SPRINZ), AUT University, Auckland, New Zealand.
Lucy S KemberYouth Physical Development Centre, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK.
Gregory D MyerDivision of Sports Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Department of Pediatrics and Orthopaedic Surgery, College of Medicine, University of Cincinnati, Cincinnati, OH, USA; The Micheli Center for Sports Injury Prevention, Boston, MA, USA.
Paul J ReadAthlete Health and Performance Research Centre, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar; School of Sport and Exercise, University of Gloucestershire, Gloucester, UK.
Cardiff Metropolitan University · GBAuckland University of Technology · NZThe Micheli Center for Sports Injury Prevention · USUniversity of Gloucestershire · GB

Funding

Real-Time Sensorimotor Feedback for Injury Prevention Assessed in Virtual RealityU01AR067997 · NIAMS · EMORY UNIVERSITY · PI MYER, GREGORY DONALD · 2016 to 2022
$3.6M
NIAMS NIH HHS U01 AR067997
6 · The paper itself

Abstract

backgroundThe triple hop for distance test commonly uses a limb symmetry index (LSI) 'pass' threshold of >90% for total hop distance following anterior cruciate ligament reconstruction (ACLR). However, understanding the manner in which athletes generate and dissipate forces during consecutive hops within the test may provide greater insight into residual limb deficits. The aim of the study was to examine reactive strength ratios (RSR) of individual hops during a triple hop test in a cohort of ACLR patients at discharge prior to return-to-sport.

methodsTwenty male athletes (24.6 ± 4.2 years; height 175.3 ± 10.2 cm; mass 73.6 ± 14.5 kg) completed the test on both non-operated and operated limbs. Total distance hopped, contact times, flight times and RSR were collected for each hop using a floor-level optical measurement system.

resultsSignificant, small to moderate between-limb differences (p < 0.05; d = 0.45-0.72) were shown for triple hop distance, flight time and RSR for each hop, with lower performance consistently displayed in the operated limb. Large, significant differences in RSR were evident between hops one and two on the operated limb (p < 0.05; d = 0.97). Despite 80% of participants achieving >90% LSI for total hop distance, less than 50% of participants reached the >90% LSI threshold for RSR.

conclusionsStandardised LSI 'pass' thresholds (>90% LSI) for triple hop distance may mask residual deficits in reactive strength performance of operated limbs; therefore, more detailed analyses of individual hop performance may be warranted to enhance return to sport criteria following ACLR.

Indexed as

Return to SportAnterior Cruciate Ligament InjuriesAnterior Cruciate Ligament ReconstructionExercise TestHumansMaleMuscle StrengthYoung AdultKnee injuryLimb symmetry indexReturn-to-sportSoccerTriple hop

Identifiers

PMID33010748
PMCPMC9892801
OpenAlexW3041790903

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.