Evidence map›Paper›PMID 37269013›Full record

ArticleBMC musculoskeletal disorders2023

Risk factors for hamstring strain injury in male college American football players -a preliminary prospective cohort study.

Yuri Mizutani, Shuji Taketomi, Kohei Kawaguchi, Seira Takei, Ryota Yamagami, Kenichi Kono, Tomofumi Kage, Shin Sameshima, Hiroshi Inui, Sayaka Fujiwara and 2 more

Abstract read
In one paragraph

Article in BMC musculoskeletal disorders, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 1 pooled it
–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 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Prevention and Rehabilitation of the Athletic Hamstring Injury.Arthroscopy, sports medicine, and rehabilitation · 2025
    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

12 authors.

Yuri MizutaniUTokyo Sports Science Institute (UTSSI), Komaba I Campus, 3-8-1, Komaba, Meguro-Ku, 3rd Floor, Bldg.9, Tokyo, 153-8902, Japan.
Shuji TaketomiUTokyo Sports Science Institute (UTSSI), Komaba I Campus, 3-8-1, Komaba, Meguro-Ku, 3rd Floor, Bldg.9, Tokyo, 153-8902, Japan. takeos-tky@umin.ac.jp.
Kohei KawaguchiUTokyo Sports Science Institute (UTSSI), Komaba I Campus, 3-8-1, Komaba, Meguro-Ku, 3rd Floor, Bldg.9, Tokyo, 153-8902, Japan.
Seira TakeiUTokyo Sports Science Institute (UTSSI), Komaba I Campus, 3-8-1, Komaba, Meguro-Ku, 3rd Floor, Bldg.9, Tokyo, 153-8902, Japan.
Ryota YamagamiDepartment of Orthopaedic Surgery Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan.
Kenichi KonoDepartment of Orthopaedic Surgery Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan.
Tomofumi KageDepartment of Orthopaedic Surgery Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan.
Shin SameshimaDepartment of Orthopaedic Surgery Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan.
Hiroshi InuiDepartment of Orthopaedic Surgery Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan.
Sayaka FujiwaraUTokyo Sports Science Institute (UTSSI), Komaba I Campus, 3-8-1, Komaba, Meguro-Ku, 3rd Floor, Bldg.9, Tokyo, 153-8902, Japan.
Sakae TanakaDepartment of Orthopaedic Surgery Faculty of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan.
Toru OgataUTokyo Sports Science Institute (UTSSI), Komaba I Campus, 3-8-1, Komaba, Meguro-Ku, 3rd Floor, Bldg.9, Tokyo, 153-8902, Japan.

Funding

Japan Society for the Promotion of Science KAKENHI 20K11358
6 · The paper itself

Abstract

backgroundGiven the frequency of hamstring strain injuries (HSI) among male college American football players, several studies have attempted to determine whether certain risk factors can predict their occurrence. However, no consensus on modifiable risk factors for HSIs in male college American football players has yet been reached to prevent these injuries. This study aimed to clarify risk factors for HSI prospectively in college male American football players.

methodsA total of 78 male college American football players, whose positions were limited to skill positions, were medically assessed for potential risk factors of HSI. The preseason medical assessment included anthropometric measurements, joint laxity and flexibility, muscle flexibility, muscle strength, and balance ability.

resultsHSI occurred in a total of 25 thighs from 25 players (32.1%). Injured players had significantly lower hamstring flexibility (p = 0.02) and hamstring to quadriceps strength ratio (H/Q) (p = 0.047) compared to uninjured players. Additionally, injured players had significantly lower general joint laxity scores, especially for the total (p = 0.04), hip (p = 0.007), and elbow (p = 0.04) scores, compared to uninjured players.

conclusionsLower hamstring flexibility, lower hamstring to quadriceps strength ratio, and lower general joint laxity score were identified as risk factors for HSI in male college American football players placed in skill positions. The muscle flexibility and H/Q ratio could be useful in preventing HSI in such players.

Indexed as

Athletic InjuriesFootballHamstring MusclesJoint InstabilityMuscular DiseasesSoft Tissue InjuriesHumansMaleMuscle StrengthProspective StudiesRisk FactorsCollege American football playerGeneral joint laxityHamstring flexibilityHamstring strain injuryHamstring to quadriceps strength ratioInjury preventionRisk factor

Identifiers

PMID37269013
PMCPMC10236836

What OpenQuestion holds

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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.