Evidence map›Paper›PMID 31431899›Full record

ArticleOrthopaedic journal of sports medicine2019

Hamstring Injury Trends in Major and Minor League Baseball: Epidemiological Findings From the Major League Baseball Health and Injury Tracking System.

Kelechi R Okoroha, Stan Conte, Eric C Makhni, Vincent A Lizzio, Christopher L Camp, Bernard Li, Christopher S Ahmad

Abstract read
In one paragraph

Article in Orthopaedic journal of sports medicine, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 2 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

13 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. A Systematic Review of the Orthopaedic Literature on Truncal and Lower Extremity Injuries in Major League Baseball Players.Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews · 2021
    Pooled it
  2. Pooled it
  3. Prevention and Rehabilitation of the Athletic Hamstring Injury.Arthroscopy, sports medicine, and rehabilitation · 2025
    Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Lower Extremity Muscle Injuries in the Overhead Athlete.Current reviews in musculoskeletal medicine · 2022
    Review
  10. Article
  11. Offseason Workout Recommendations for Baseball Players.Current reviews in musculoskeletal medicine · 2021
    Review
  12. Article
  13. 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

7 authors.

Kelechi R OkorohaDepartment of Orthopedic Surgery, Henry Ford Hospital, Detroit, Michigan, USA.
Stan ConteSanta Clara University, Santa Clara, California, USA.
Eric C MakhniDepartment of Orthopedic Surgery, Henry Ford Hospital, Detroit, Michigan, USA.
Vincent A LizzioDepartment of Orthopedic Surgery, Henry Ford Hospital, Detroit, Michigan, USA.
Christopher L CampMayo Clinic, Rochester, Minnesota, USA.
Bernard LiLos Angeles Angels, Anaheim, California, USA.
Christopher S AhmadColumbia University New York Presbyterian Hospital, New York, New York, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundHamstring strains are the most common injury for professional baseball players and can result in significant time on the disabled list. To date, no study has reported the current trends in hamstring strains in professional baseball. HYPOTHESIS: Professional baseball players would have an increased incidence of hamstring strains from 2011 through 2016. STUDY

designDescriptive epidemiology study.

methodsInjury data were prospectively collected from 2011 through 2016 for every Major League Baseball (MLB) and Minor League Baseball (MiLB) team and was recorded in the MLB Health and Injury Tracking System. Data collected for this study included date of injury, activity during injury, time lost, primary injury or reinjury status, and imaging findings as well as player demographic information related to level of play, age, and position for all hamstring injury events. Injury rates were reported as hamstring injuries per number of games.

resultsFrom 2011 to 2016, there were 2633 hamstring strains in professional baseball players. The rate of hamstring strains increased in MLB from a low of 1 injury every 39 games in 2011 to a high of 1 injury every 30 games in 2016. In MiLB, there were 2192 hamstring strains, with 1 injury every 35 games in 2011 compared with 1 injury every 30 games in 2016. The majority of injuries occurred in the infielder positions (37.5%) and resulted from base running (>50%), most commonly from home to first base. The most common hamstring injury was a grade 2 injury to the distal biceps femoris. The mean time missed after a hamstring injury was 14.5 days. Grade 3 and grade 2 hamstring strains resulted in significantly more days missed compared with grade 1 injuries (

conclusionThe rate of hamstring strains in professional baseball players has increased over the past 6 years and has resulted in a significant loss of playing time. Study results indicated that these injuries are affected by injury characteristics, position played, running to first base, seasonal timing, and history of hamstring injuries.

Indexed as

hamstringinjuryMajor League BaseballMinor League BaseballMLBmuscle strain

Identifiers

PMID31431899
PMCPMC6685122

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.