Evidence map›Paper›PMID 31822295›Full record

ArticleJournal of orthopaedic surgery and research2019

Difference in leg asymmetry between female collegiate athletes and recreational athletes during drop vertical jump.

Yutaro Morishige, Kengo Harato, Shu Kobayashi, Yasuo Niki, Morio Matsumoto, Masaya Nakamura, Takeo Nagura

Open access · goldAbstract readComparative Study
In one paragraph

Article in Journal of orthopaedic surgery and research, 2019. 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
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

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3 · Its place in the literature

Who cites it

6 citing papers in PubMed, 28 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

7 authors at 1 institution in 1 country.

Yutaro MorishigeDepartment of Orthopedic Surgery, Keio University School of Medicine, Tokyo, Japan.
Kengo HaratoDepartment of Orthopedic Surgery, Keio University School of Medicine, Tokyo, Japan. kharatoh@yahoo.co.jp.ORCID http://orcid.org/0000-0003-1796-2823
Shu KobayashiDepartment of Orthopedic Surgery, Keio University School of Medicine, Tokyo, Japan.
Yasuo NikiDepartment of Orthopedic Surgery, Keio University School of Medicine, Tokyo, Japan.
Morio MatsumotoDepartment of Orthopedic Surgery, Keio University School of Medicine, Tokyo, Japan.
Masaya NakamuraDepartment of Orthopedic Surgery, Keio University School of Medicine, Tokyo, Japan.
Takeo NaguraDepartment of Orthopedic Surgery, Keio University School of Medicine, Tokyo, Japan.
Keio University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundNeuromuscular imbalance will lead to loading asymmetry in sporting activities. This asymmetry is related to leg dominance, which has been associated with increased risk of anterior cruciate ligament (ACL) injury. Therefore, potential biomechanical differences between legs are important. However, little attention has been paid to the biomechanical details of leg dominance. The purpose of the present study was to clarify the relationship between leg dominance and knee biomechanics in females with different activity level during dynamic athletic tasks.

methodsA total of 23 female collegiate (mean age = 19.6 ± 1.4 years, mean body mass index = 21.5 ± 0.9) and 19 recreational athletes (mean age = 20.7 ± 1.1 years, mean body mass index = 20.5 ± 1.7) were enrolled. Tegner activity scores of the collegiate and recreational athletes were 9 and 7, respectively. Knee kinematic and kinetic asymmetries between the dominant (DL) and non-dominant (NDL) legs during the landing phase of drop vertical jump (DVJ) were assessed using three-dimensional motion analysis in collegiate and recreational athletes separately. Statistical comparison was done using two-tailed paired t test between DL and NDL in each athlete.

resultsThe peak knee abduction angle was significantly larger on the DL than on the NDL in collegiate athletes. Knee abduction angle at initial contact (IC), peak knee abduction angle, knee internal rotation angle at IC, and peak knee internal rotation angle were significantly larger on the NDL than on the DL in recreational athletes. Moreover, peak knee abduction moment within 40 ms from IC was larger on the NDL than on the DL in recreational athletes, while the moment was not significantly different in collegiate athletes.

conclusionsFrom the present study, the relationship between leg dominance and knee biomechanics was totally different in females with different activity level. Specifically, asymmetry of the knee abduction angle between limbs was opposite between female recreational and collegiate athletes. According to previous literatures, abduction and internal rotation angles as well as abduction moment were key issues for mechanism of non-contact ACL injury. Therefore, the NDL in female recreational athletes was associated with increased risk of ACL injury.

Indexed as

AthletesGames, RecreationalAdolescentAnterior Cruciate LigamentAnterior Cruciate Ligament InjuriesBiomechanical PhenomenaFemaleHumansLegSportsYoung AdultAnterior cruciate ligamentAsymmetric motionExercise intensityJump taskLeg dominanceLower extremityNon-contact injury

Identifiers

PMID31822295
PMCPMC6905029
OpenAlexW2993705006

What OpenQuestion holds

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LicenceCC BY
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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.