Exercise addiction in Mexico: Psychometric properties of the Exercise Addiction Inventory and risk analysis

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Introduction: The consequences of exercise addiction have a physical, psychological and social impact on the sports men and women, similar to others addictions, which can cause serious health problems. In Mexico its incidence and relevance are unknown, and there is no instrument for its evaluation. This study aims to analyse the psychometric properties of the Exercise Addiction Inventory in a Mexican context and examine its relevance to different groups of people who practice sport. Method: Participants consisted of 487 people who practice physical exercise or competitive sport, aged between 18 and 52, with a mean age of 22.04. The EAI was used, and reliability analysis, confirmatory factor analysis and factorial invariance analysis were conducted. Differences between groups of participants were also tested. Results: The results demonstrated the unifactorial structure of instrument, with satisfactory goodness of fit indices, and its factorial invariance was confirmed. The reliability obtained was adequate. In addition, significant differences were found between men and women in relation to degree of addiction, there was a higher risk for athletes compared to regular exercise goers, and 26.5% of participants obtained scores that place them at a high risk of exercise addiction. Conclusions: It is concluded that EAI is an adequate and reliable instrument, with appropriate psychometric properties. In the studied population there is an excessively high rate of participants who present a high risk of addiction, and men and athletes are the most susceptible groups to develop an exercise addiction.