20206-06-19 アイルランド・リムリック大学（UL）
＜関連情報＞
- https://www.ul.ie/news/ul-and-irfu-research-reveals-lowering-of-tackle-height-in-rugby-has-led-to-sharp-decline-in
- https://www.jsams.org/article/S1440-2440(26)00206-9/fulltext
タックル行動の試験により脳震盪および全体的な負傷率が低下：成人男子、女子、および学童ラグビーユニオンにおける7シーズンにわたる前向き研究 Tackle behaviour trial lowers concussion and overall injury rates: A seven-season prospective study in adult men’s, women’s and schoolboy rugby union
Lauren Guilfoyle ∙ Kilian Bibby ∙ Patrick Dolan ∙ … ∙ Rod McLoughlin ∙ Tom Comyns ∙ Ian Kenny
Journal of Science and Medicine in Sport Published:May 25, 2026
DOI:https://doi.org/10.1016/j.jsams.2026.05.011
Abstract
Objectives
To determine the impact of lowering the legal tackle height from the armpit to the base of the sternum on tackle-event match concussion, all tackle-event and overall match injury rates across adult community (men and women) and schoolboy rugby union competitions in Ireland.
Design
Prospective observational study comparing seasons prior to the law change (control seasons: 2017/18–2022/23) with seasons post law change (intervention seasons: 2023/24–2024/25).
Methods
Match injury and exposure data were collected from community adult men’s, adult women’s and schoolboy teams participating in community rugby competitions across seven and five seasons for adult and schoolboy competitions respectively. Incidence rates per 1000 match hours and incidence rate ratios with 95% confidence intervals (CIs) were calculated.
Results
Two hundred and thirty-nine teams participated, accounting for 8805 player-seasons. Significant reductions were observed in tackle-event concussion rates for both adult men (IRR = 0.62, 95% CI 0.47–0.82) and adult women (IRR = 0.37, 95% CI 0.14–0.96) and tackle-event injury incidence rates (adult men: IRR = 0.79, 95% CI 0.71–0.89; adult women: IRR = 0.66, 95% CI 0.49–0.87). Non-significant increases in the frequency and incidence rates of match concussion amongst schoolboys were also observed. Across all three cohorts, match injury incidence rates decreased during the intervention seasons by 18% in adult men’s competitions (IRR = 0.82, 95% CI 0.75–0.89), 30% in adult women (IRR = 0.70, 95% CI 0.57–0.88) and 19% in schoolboys (IRR = 0.81, 95% CI 0.69–0.95) compared to the control seasons.
Conclusions
This is the first study exploring the impact of a lowered tackle height in rugby union to report significantly positive results across the adult game. Subsequent work should aim to understand the schoolboy context to inform further targeted interventions.
