Caffeine Kinetics and CrossFit®-Specific Performance

This study examines how caffeine is processed in the body (pharmacokinetics) and how it affects performance in CrossFit and high-intensity functional training (HIFT). It aims to help athletes understand the optimal caffeine dose and timing for peak performance. You may be eligible if... - You are a male between 18 and 40 years old - You have at least 5 years of sports training experience and at least 2 years in high-intensity functional training - You train at least 3 sessions per week - You participate in CrossFit competitions at least once a year - You have medical clearance to practice sports You may NOT be eligible if... - You have a current injury or health condition preventing participation - You feel generally unwell - You are unwilling to follow the study protocol - You smoke or use tobacco - You had an infectious disease in the past 4 weeks Talk to your doctor to see if this trial is right for you.