**8. Conclusion**

This study discusses the HR in people with ID comparing the resting HR and HR after 2 minutes of exercise of athletes participating in SO in table tennis and cross-country skiing (50 m, 1 km, and 3 km). The results showed a similar increase between the resting HR and HR after 2 minutes of exercise for TT players and XC skiers competing in 3 km race. Changes in HR and in XC skiers competing in 50 m and 1 km races between the rest and exercise were noticeably higher indicating their lower fitness. Additionally, the high prevalence of overweight and obesity highlights the need for healthy lifestyle education in athletes with ID, especially in 50 m XC skiers. Despite the limitation of this study consisting of a small number of participants, the results highlight the coach's responsibility to select appropriate event according to the athlete's abilities and limits, but a more demanding training should be necessary. Future studies focused on the relationship of HR variables and training quality will provide a more detailed knowledge of the cardiorespiratory fitness and ID relationship.
