The Germany national football team is a symbol of football fever. Fans experience strong emotional reactions during a match, ranging from joy to frustration. A study has now investigated the physiological responses of fans during a match. The results show that fans exhibit increased heart rates and stress levels before and during a match. This is an indication that football fever has a strong emotional impact on fans. The study also showed that the physiological responses of fans during a match are influenced by various factors, such as the intensity of the match and the identification with the team. The results of this study can help to improve the understanding of the emotional impact of football on fans.