Football fans' emotional attachment to their clubs as a predictor of weight loss in a prevention programme for men with obesity.

Data about which factors in lifestyle interventions facilitate weight loss (WL) success in men is still scarce. The Football Fans in Training (FFIT) programme in Germany attracts men with overweight and facilitates meaningful weight reduction. The goal of this study was to evaluate the possible impact of the fans' emotional attachment to their favourite football clubs on achieving at least 5% WL among the male-only participants. All 791 FFIT intervention participants of 2017 and 2018 were included in the study. We performed two separate logistic regression analyses: (a) baseline values of several participant characteristics as predictors of a 5% WL and (b) change scores of participants' health behaviour characteristics from the course start to end as predictors of the 5% WL. In addition, both models included the Emotional Attachment to a Sports Team (EAST). Analyses were based on the intention-to-treat principle. Higher EAST at baseline was associated with WL success, as was higher WL self-efficacy, lower score in vegetable intake and higher score in food high on carbohydrates. In the second analysis, EAST, an increase in fruit intake, vegetable intake, whole-grain intake and steps per day, as well as a reduction of fatty food intake, were associated with 5% WL success. The predictors are mostly explorative and limited to correlations. The results indicate that EAST was an independent predictor of WL success in the participating football fans. This understanding might be used for tailoring future interventions in sports or similar settings.