Objective: To investigate the incidence of acute injuries and soccer-related chronic pain from long-term training and during matches in adolescent players using natural grass turfs (NT) and artificial turfs (AT).
Design: Case-controlled prospective study.
Setting: Institutional-level Fédération Internationale de Football Association Medical Centre of Excellence.
Participants: Youth soccer players (12-17 years of age) from 6 teams, with a predominant tendency to train on either NT or AT, were included. Of 332 players enrolled in this study, 301 remained to completion.
Interventions: Medically diagnosed acute injuries and chronic pain were recorded daily by team health care staff throughout 2005, and reports were provided monthly to the authors.
Assessment of Risk Factors: Noninvasive prospective study.
Independent Variables: Age and turf type.
Main Outcome Measures: Acute injuries per 1000 player hours on each surface and chronic complaints per 1000 player hours were evaluated according to frequency of surface used ≥80% of the time. Incidence rate ratio (IRR) of acute injuries and chronic complaints during play on NT and AT was calculated.
Results: There was no significant difference in the incidence of acute injuries between the 2 surfaces during training and competition. However, the AT group showed a significantly higher incidence of low back pain during training (IRR, 1.62; 95% confidence interval, 1.06-2.48). Early adolescence and prolonged training hours were factors associated with an increased incidence of chronic pain in the AT group.
Conclusion: Adolescent players routinely training on AT for prolonged periods should be carefully monitored, even on AT conforming to new standards.
From the *Department of Orthopaedic Surgery, St. Marianna University School of Medicine, Kawasaki, Japan; †FIFA Medical Centre of Excellence at Kawasaki, Kawasaki, Japan; ‡Department of Sports Medicine, St. Marianna University School of Medicine, Kawasaki, Japan; §Orthopaedic Surgery, Kawasaki Steel Company Hospital, Chiba, Japan; and ¶Orthopaedic Surgery, Nishi-Omiya Hospital, Saitama, Japan.
Submitted for publication May 18, 2009; accepted October 19, 2009.
We received no research funding from any other source.
The authors state that they have no financial interest in the products mentioned within this article.
Reprints: Haruhito Aoki, MD, Department of Orthopaedic Surgery, St. Marianna University School of Medicine, 2-16-1, Sugao, Miyamae-ku, Kawasaki, Kanagawa 216-8511, Japan (e-mail: email@example.com).