Evidence map›Paper›PMID 27652049›Full record

ArticleSpringerPlus2016

Asymmetrical and smaller size of trunk muscles in combat sports athletes with lumbar intervertebral disc degeneration.

Kazunori Iwai, Koji Koyama, Takashi Okada, Koichi Nakazato, Ray Takahashi, Shingo Matsumoto, Yosuke Yamamoto, Kenji Hiranuma

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

Article in SpringerPlus, 2016. 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
1.0field-weighted citation impact, top 24% 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

8 citing papers in PubMed, 13 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

8 authors at 4 institutions in 2 countries.

Kazunori IwaiSchool of Kinesiology, Western University, 1151 Richmond Street, London, ON N6A 3K7 Canada ; Hiroshima Maritime College, National Institute of Technology, 4272-1 Higashino Osakikamijima-cho, Toyota-gun, Hiroshima, 725-0231 Japan.ORCID 0000-0001-8353-3520
Koji KoyamaDepartment of Judotherapy, Tokyo Ariake University of Medical and Health Science, 2-9-1 Ariake, Koto-ku, Tokyo, 135-0063 Japan.
Takashi OkadaFaculty of Sport Science, Nippon Sport Science University, 7-1-1 Fukasawa, Setagaya-ku, Tokyo, 158-8508 Japan.
Koichi NakazatoGraduate School of Health and Sport Science, Nippon Sport Science University, 7-1-1 Fukasawa, Setagaya-ku, Tokyo, 158-8508 Japan.
Ray TakahashiSchool of Kinesiology, Western University, 1151 Richmond Street, London, ON N6A 3K7 Canada.
Shingo MatsumotoSports Methodology (Wrestling), Nippon Sport Science University, 1221-1, Kamoshida-cho, Aoba-ku, Yokohama, Kanagawa 227-0033 Japan.
Yosuke YamamotoSports Methodology (Judo), Nippon Sport Science University, 7-1-1 Fukasawa, Setagaya-ku, Tokyo, 158-8508 Japan.
Kenji HiranumaGraduate School of Health and Sport Science, Nippon Sport Science University, 7-1-1 Fukasawa, Setagaya-ku, Tokyo, 158-8508 Japan.
Nippon Sport Science University · JPNational Institute of Technology, Hiroshima College · JPTokyo Ariake University of Medical and Health Sciences · JPWestern University · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundLumbar intervertebral disc degeneration (LDD) frequently occurs in athletes. Associations between LDD and trunk muscles still remain unclear. PURPOSE: This study examined whether there is an association between the prevalence of LDD and the symmetry and size of the cross-sectional areas (CSAs) of the trunk muscles in combat sports athletes.

methodsParticipants in this study were 151 collegiate male combat sports athletes. A total of 755 lumbar intervertebral discs from L1-2 to L5-S1 in 151 athletes were assessed using magnetic resonance imaging (MRI) and a comprehensive grading system of LDD (grades I-V). All 151 athletes were divided into 2 groups: LDD and non-LDD. CSAs of trunk muscles at the L3-4 disc level were measured using MRI.

resultsSixty-nine athletes had LDD at 1 or more disc levels (45.7 %). The LDD grade for the lower 2 disc levels was significantly higher than that for the other disc levels (p < 0.001). The CSAs of the left and right sides in trunk muscles were significantly asymmetrical, independent of the LDD which was prevalent in the disc levels (obliques: p = 0.040; quadratus lumborum: p < 0.001). The relative CSAs of trunk muscles to their body weight in the LDD group were significantly smaller than those in the non-LDD group (rectus abdominis: p = 0.011; obliques: p = 0.024; quadratus lumborum: p = 0.006; lumbar erector spinae plus multifidus: p = 0.001).

conclusionThis study suggests that the prevalence of LDD is associated with asymmetrical and relatively smaller CSAs of trunk muscles in combat sports athletes.

Indexed as

Asymmetrical anatomyContact sportsMuscle atrophyRadiological abnormality

Identifiers

PMID27652049
PMCPMC5009060
OpenAlexW2510093169

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.