Motocross is one of the most popular high-speed motorcycle races, which takes place on a naturally closed track with significant challenges. This study aimed to characterize anthropometric, circulatory, and lower and upper limb muscle properties based on laboratory and race-recorded characteristics. Male competitors (n = 3) aged 14 years (MX) were included in the study. All three boys have national and international experience. Metabolic characteristics (ventilation, oxygen consumption, and carbon dioxide production) and heart rate (HR) were measured in the laboratory while HR and speed were measured while racing. No significant difference was found between the three competitors in terms of HR during the race. In terms of number of sprints (No. sprint) and maximum speed (Speedmax), we found the most successful runner (highest finisher) to have the most sprints and maximum speed. Comparing the metabolic characteristics, it was found that racing was between the respiratory breakpoint (VT1) and the respiratory compensation point (RCP), but, in several cases, crossed the anaerobic threshold. While motocross riders are exposed to extreme conditions and high physical demands, in motorsport, victories depend not only on the athlete’s physical abilities but also on several factors such as driving technique, mental effort, equipment efficiency and resistance, race strategy, and team competence.

Introduction – SuperEnduro is a high-risk motorcycle sport with no prior empirical data. This case study analyzed an elite rider during the fifth round of the 2023/2024 SuperEnduro Grand Prix. Methods – Psychological measures included core-, positive-, and negative affect, expected and perceived performance, mental and physical exhaustion, perceived risk of racing addiction, and a post-race interview. Physiological measures encompassed heart rate, caloric expenditure, work intensity, and training loads. Results – Results showed a decline in core affect, with positive affect remaining high and negative affect low after three races. Anxiety decreased progressively, but perceived and objective performance remained low. Elevated physiological measures and subjective perceptions confirmed SuperEnduro’s intensity. The participant self-identified himself as addicted to racing. However, his addiction score was low, suggesting passion or emotional attachment—a blend of pleasure and pain—driving his commitment to race even when injured. Discussion – These findings provide insight into the physical and psychological demands unique to SuperEnduro athletes.