The Forgotten Athlete: What a New Systematic Review Tells Us About Soccer Referee Injuries | Find Your Stride | Edinburgh Podiatrist

A Look at Soccer Referee Injuries

Referees cover 10–13 km per match at genuinely demanding intensities, with repeated accelerations, decelerations, and directional changes, yet the injury research base for these athletes has been almost entirely overlooked in favour of the players they officiate.

A 2025 systematic review and meta-analysis in Sports Medicine by Alimoradi and colleagues sets out to change that, pulling together 17 studies and 3,621 referees to produce the first quantitative synthesis of injury incidence in this "occupational athlete" population. It's a genuinely useful contribution to a neglected area. It's also a textbook example of why pooled numbers from messy, heterogeneous data need to be read with real caution before they inform clinical or coaching decisions.

What the Authors Did

The authors searched five databases up to April 2025, following the PERSiST guideline for sport and exercise medicine systematic reviews. From 552 initial records, 17 studies met inclusion criteria, and 16 were entered into a random-effects Poisson regression meta-analysis. Quality was assessed with both the STROBE-SIIS reporting checklist and an adapted Newcastle–Ottawa Scale, and every included study was rated as low risk of bias — a solid result on paper, though as we'll get to, that rating doesn't capture some of the deeper issues buried in the data.

What They Found

The headline numbers most people will remember:

• Overall injury incidence: The abstract reports 2.19 injuries per 1000 hours of exposure, while the results section reports the primary model output as 1.43 per 1000 hours (95% CI 0.95–2.14) — worth noting for anyone citing this paper, as the two figures don't match and it's not immediately obvious from the text which one is the "true" headline estimate.

• On-field referees: 1.46 injuries per 1000 hours (95% CI 0.76–2.81)

• Assistant referees: 0.84 injuries per 1000 hours (95% CI 0.36–1.97) — on-field referees carry roughly 54% higher injury risk

• Match play: 2.24 injuries per 1000 hours, more than three times the rate seen in training: 0.67 injuries per 1000 hours

• Anatomical hotspots: calf/lower leg (31.5% of injuries), thigh (25.3%), and knee (21%) — with strains (52.5%) and sprains (21.2%) the dominant injury types

  
  

For context, this places referees well below the injury rates typically reported for outfield players (5.5–7.9 per 1000 hours), which makes sense given referees don't contest the ball and therefore carry essentially no contact-injury risk. One encouraging finding buried in the discussion: a single randomised controlled trial (Al Attar et al., using the FIFA 11+ Referees warm-up programme) reported a 65% reduction in injuries among male amateur referees — genuinely promising, evidence-based, and something sports podiatrists working with amateur match officials could reasonably recommend.

The Critical Read: Heterogeneity You Can't Meta-Analyse Your Way Out Of

This is where clinicians need to slow down. The overall model reported an I² of 98.46% — meaning essentially all of the variation between studies is due to genuine differences between them, not sampling error. That's about as high as heterogeneity statistics get, and it didn't meaningfully improve even after extensive moderator analysis (age, sex, referee role, level, injury definition, study design, exposure period). Nearly every sub-group estimate in this review still carried I² values above 90%.

A few specific issues explain why: Wildly inconsistent injury definitions. Studies defined "injury" as time-loss, referee-leaves-the-field, or requiring-medical-attention — and these produced drastically different incidence estimates (3.18 vs 0.81 injuries per 1000 hours depending on definition). A referee wouldn't need to leave the field for an injury sustained in training, meaning some of these definitions systematically miss entire categories of injury depending on setting.

An eight-fold gap between prospective and retrospective studies. Prospective designs reported 6.65 injuries per 1000 hours; retrospective designs reported just 0.84. That's not a subtle discrepancy — it's a massive signal that retrospective, recall-based studies (the majority of the evidence base) are substantially underestimating true injury burden, particularly for minor, training-based, or overuse complaints that referees simply forget to report months or years later.

A "significant" female referee effect built on almost no data. Female referees showed an estimated incidence over four times higher than males (RR 84.13, 95% CI 8.59–823.77) — but that estimate comes from just four studies and a startlingly wide confidence interval spanning two orders of magnitude. Statistically "significant," clinically almost uninterpretable. This is less a finding about female referee injury risk and more a flashing sign that this population has barely been studied at all — something the authors themselves acknowledge as a critical gap.

Overuse injuries are largely invisible. Only a handful of studies attempted to categorise injuries as acute versus chronic/overuse, and the split reported (48% acute, 52% chronic) came from a small subset of the total dataset. For a population covering the distances referees do, week after week, season after season, the absence of good overuse injury surveillance — the Achilles tendinopathies, plantar fasciopathies, and tibial stress issues sports podiatrists would expect to see — is a meaningful blind spot, not just a footnote.

What This Means for Clinical Practice

For sports podiatrists and clinicians treating match officials — amateur weekend referees especially, who make up the bulk of the world's 800,000+ officials — the practical takeaways are: Referees are functionally endurance athletes with an unusual, stop-start movement profile (especially assistant referees, who spend a striking proportion of match time in lateral shuffling and near-stationary positioning rather than the more linear running pattern seen in on-field referees). That distinct movement signature is a legitimate reason to think about referee-specific rehab and prevention programming rather than simply extrapolating from outfield player protocols.

The anatomical pattern — calf, thigh, knee — lines up with what you'd expect from a population managing high training age, moderate-to-high running volumes, and inconsistent access to sports medicine support (most referees, even at semi-professional level, don't have the dedicated medical teams players do). The FIFA 11+ Referees programme is currently the single best evidence-based prevention tool available, and it's reasonable to suggest it to referees presenting for injury prevention advice, given its RCT-level support.

But the incidence figures themselves — 1.43, 1.46, 2.19, whichever number you land on — should be treated as rough, heterogeneous ballpark estimates, not precise risk figures to counsel individual patients with. The 98% heterogeneity effectively means "somewhere between these numbers, depending enormously on who's reporting it and how."

The Real Takeaway: A Good First Map of Uncharted Territory

This review deserves credit simply for existing — it's the first attempt to systematically quantify injury risk in a population that keeps the entire sport running and has been almost totally ignored by sports science. But the honest clinical reading is that we now have a map of where the gaps are, more than a reliable set of numbers to act on. Female referees, overuse injuries, training-specific risk, and standardised injury definitions all need dedicated, prospective, well-designed research before this evidence base can meaningfully inform individualised prevention advice.

In the meantime, if a referee walks into your clinic with a calf strain or an aching knee after a heavy fixture list, the message is simple: they're managing genuine athletic loading demands with far less structured support than the players they're officiating — and they deserve the same evidence-informed care.

Find Your Stride!

Citation:

Alimoradi, M., Alghosi, M., Iranmanesh, M., Moinuddin, M., & Relph, N. (2025). Epidemiology of injury in elite and amateur soccer referees: a systematic review and meta-analysis. Sports Medicine, 55(11), 3111–3128. https://doi.org/10.1007/s40279-025-02326-y