Evidence map›Paper›PMID 35619586›Full record

SynthesisSports health

Comparison of the H:Q Ratio Between the Dominant and Nondominant Legs of Soccer Players: A Meta-analysis.

Fabian D Lutz, Christopher J Cleary, Hannah M Moffatt, Violet E Sullivan, Dain P LaRoche, Summer B Cook

Open access · greenAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Sports health. 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
2.8field-weighted citation impact, top 10% 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

13 citing papers in PubMed, 2 syntheses or guidelines pooled it, 16 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Article
  6. Article
  7. Effects of infrapatellar straps on lower limb muscle synergies during running.Medical & biological engineering & computing · 2025
    Article
  8. Article
  9. Observational
  10. Article
  11. Article
  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

6 authors at 1 institution in 1 country.

Fabian D LutzRobert Kertzer Exercise Physiology Laboratory, Department of Kinesiology, University of New Hampshire, Durham, New Hampshire.
Christopher J ClearyRobert Kertzer Exercise Physiology Laboratory, Department of Kinesiology, University of New Hampshire, Durham, New Hampshire.
Hannah M MoffattRobert Kertzer Exercise Physiology Laboratory, Department of Kinesiology, University of New Hampshire, Durham, New Hampshire.
Violet E SullivanRobert Kertzer Exercise Physiology Laboratory, Department of Kinesiology, University of New Hampshire, Durham, New Hampshire.
Dain P LaRocheRobert Kertzer Exercise Physiology Laboratory, Department of Kinesiology, University of New Hampshire, Durham, New Hampshire.
Summer B CookRobert Kertzer Exercise Physiology Laboratory, Department of Kinesiology, University of New Hampshire, Durham, New Hampshire.
University of New Hampshire · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

contextSoccer players often have a dominant (D) leg, which could influence the relative strength between the quadriceps and hamstrings. The hamstring-to-quadriceps (H:Q) ratio can be assessed on a dynamometer at various velocities to provide information on injury risk.

objectiveTo assess the concentric hamstrings and concentric quadriceps strength ratio (conventional H:Q ratio) assessed in D and nondominant (ND) legs at various speeds in male soccer players. DATA SOURCES: A systematic literature search was completed from inception to 2020 in PubMed, Academic Search Ultimate, CINAHL, and SPORTDiscus. STUDY SELECTION: Keywords associated with the H:Q ratio were connected with terms for soccer players. Titles and abstracts were screened by 2 reviewers based on inclusion and exclusion criteria related to sex, playing level, language, and measurement. A total of 81 studies were reviewed and 17 studies (21%) were used. STUDY

designA meta-analysis with random effects modeling generated standardized mean differences with 95% CIs between legs and speeds. LEVEL OF EVIDENCE: Level 3. DATA EXTRACTION: A total of 38 cohorts were identified, with 14, 13, and 11 cohorts assessed at low, intermediate, and high velocities, respectively. The Quality Assessment Tool for Observational Cohort and Cross-sectional Studies from the National Institutes of Health was used.

resultsThe mean H:Q ratio at low velocities was 59.8 ± 9.5% in D leg and 58.6 ± 9.9% in ND leg, 64.2 ± 10.7% (D) and 63.6 ± 11.3% (ND) at the intermediate velocity, and 71.9 ± 12.7% (D) and 72.8 ± 12.7% (ND) at the high velocity. Low, intermediate, and high velocities had small effects of 0.13, 0.10, and -0.06, respectively.

conclusionConventional H:Q ratios vary across velocities but did not differ between D and ND limbs in male soccer players. This study may provide the foundation to establish norms and clinically meaningful differences.

Indexed as

LegSoccerCross-Sectional StudiesHumansMaleMuscle StrengthQuadriceps MuscleTorqueasymmetryhamstringsquadricepssoccer

Identifiers

PMID35619586
PMCPMC10293569
OpenAlexW4281711375

What OpenQuestion holds

Textmetadata
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.