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To date, there has been little research into the relationship between violent behavior and the practice of sport in young adolescents (both girls and boys) in the general population. Indeed, sport is often recommended as a means of prevention and an alternative to violence in adolescence. For this reason, we studied this issue in a representative sample of 14-16 year-olds (ESPAD 99). Among this sample, boys practised some form of extra-curricular sport more than girls (75% vs. 57%), this practice being more intensive (13% boys vs. 4% girls practising sport more than 8 hours per week outside of school) and more "competitive" (14% vs. 4% taking part in national and/or international events). Boys also exhibited more violent behavior than girls, including stealing (mean 0.91 for boys vs. 0.49 in girls), fighting (mean 1.71 in boys vs. 0.49 in girls) or serious offences (mean 0.66 in boys vs. 0.34 in girls). Taking part in competitions was found to be highly associated with violent behavior. In particular, competition at a national or international level was associated (in decreasing order of significance) with fighting (OR=2.35), serious offences (OR=1.78) and stealing (OR=1.58), after adjustment for age, gender, father's educational level and type of school attended. The practical implications of this study are that it is important to moderate one's judgment about the positive effects of sport in reducing youth violence, to be attentive to violent acts perpetrated in stadiums and to better analyze the eventual beneficial effects of sports clubs.

Few studies have analyzed in the general population psychoactive substance use among athletes, especially among females. In fact, sporting activity is often promoted in prevention actions, as an alternative to addiction or alcohol, tobacco or other substance misuse. So, we propose an analysis of the ESPAD 1999 sample among students (16-18 years old), focused on the relationship between sporting activities and substance use. Boys play sport more frequently than girls (71.5% versus 49.5%) and report 8 hours and more a week 4 more times than girls (14% versus 3.5%). Sixty-eight percent of boys and 36% of girls have already participated in sport competitions, more often at a local, departmental or regional level; a minority of them (26% of boys and 20% of girls) have already participated in sport competitions at a national or international level. Sporting activity is decreasing with age among girls, students from general lycée play sport more frequently than others do (vocational lycée); the higher the father's education level, the more frequently the students play sport. Moderate sporting activity (1-8 hours a week) is a protective factor against regular smoking (OR=0.54 in boys and OR=0.60 in girls) and against regular cannabis use among boys (OR=0.64). Intensive sporting activity (>8 hours a week) is a risk factor for illicit drugs (except cannabis) use (OR=2.74) and sleeping drugs/tranquillizers (OR=1.82) only among girls. Competition level is the most important risk factor for substance misuse as well in boys (except sleeping drugs/tranquillizers) as in girls. Practical implications are: adjusting health policy concerning the beneficial effects of sporting activity, raising sports associations abilities and avoiding doping and addiction in high-level sporting activities.

Early February 1999, the French Ministère de la Jeunesse et des Sports (Youth and Sports Ministry) sponsored three different studies, aiming to prevent harmful behavior in the area of sport practices among youth. Two years earlier, our health care team working with drug users published reports on the meaningfulness of intensive sports activities in the history of our patients. The present work was performed to highlight the midterm results of one of these studies, to better understand and quantify the importance of physical training in the history of a group of outpatients seen for addictive disorders and comorbid pathologies. For 20 consecutive weeks, 3,040 self-administered questionnaires were available for persons consulting 20 health centers, 2 self-help groups and a general practitioner network working in the field of alcohol or heroine abuse. One thousand one hundred and eleven questionnaires were filled out (36.1%) and returned by mail for complete analysis: 86% of the answering persons had practiced at least one sports activity or participated in physical training, 10.5% had participated in a national or international level competition, and 10.6% reported stress fractures. In the intensive sports group, 36% had used illicit drugs intravenously and 16.4% said they had already used doping substances. Only 28.4% said they experienced dependence during their period of intensive sports activities compared with 15.2% before this time, and a majority (56.4%) thereafter. Intensive sports or physical training should not be seen as a protective factor nor as a way of improving addictive behaviors. More studies are needed to evaluate individual vulnerability factors and specific harm of overtraining and to determine the exact periods when men and women participating in sports activities are likely to abuse drugs, especially at the end of their career.