Unhealthy and high-risk behaviors are important public health problems with both long- and short-term effects (
1). Ford describes risky behavior as any behavior that increases negative health-related outcomes for the doer (
2). Since the end of the 1980s, risky behaviors in the youth have become a major issue for public health (
3). More attention has been recently paid to the role of sports in preventing (
4) and controlling HRBs. Some studies showed sports programs were associated with decreases in some HRBs (
4-
6). Conversely, other studies showed that they were associated with increases in some HRBs (
3,
4,
7,
8). These contradictions, along with the issue that these studies were often limited to educational contexts (e.g., high schools, colleges), and therefore failed to include sports participation in other settings (
4), makes it necessary to do more research. In addition, it is not known that the frequency of HRBs in professional levels increases or decreases.
Several factors, such as gender differences, competition type, sports motivations, sports level, and sports type (
8,
9), can influence the athlete's decision on the involvement in HRBs. While it seems that the sports level can affect the prevalence of HRBs, no research has studied the effect of sports level, especially in a sample of professional athletes. Professional athletes are often role models for adolescents and young adults, who often mimic their behaviors, including drug abuse (
10). Today, professional athletes’ behaviors due to media and social networks are more in the public’s eye than before. Some professional athletes tend to use drugs to improve their performance, increase the chance of winning, do self-treat, and deal with stressors (
11). Some of them may engage in risky behaviors such as drinking alcohol, tobacco use, and violence that threaten their health. In contrast, professional athletes are commonly characterized as being fit, strong, and healthy (
12). Although professional athletes would receive medically supervised injections of hormones and other performance-enhancing drug regimens (
10) to maintain their physical capacities and performance in sports, in some cases, because of winning at all costs and other reasons, some professional athletes engage in some HRBs such as doping (
13). As professional athletes must serve as role models and spokesmen for drug-free sports and lifestyles (
10), examining the prevalence of HRBs in professional athletes engaging in different sports is very important and may reveal optimal strategies for health professionals. According to Bovard (2008), it is important to look at the prevalence of risk behaviors in sports (
2) and among athletes. As no research has examined the prevalence of HRBs in professional athletes, the primary purpose of our study was to examine the prevalence of HRBs in Iranian professional athletes.