Neurotransmitter Analysis, Stress, and Energy Availability in Athletes

The goal of this observational study is to examine if there is a correlation between energy deficiency, neurotransmitter levels, and exercise test performance among athletes in the Polish national rowing team. The main questions it aims to answer are: Does relative energy deficiency (RED) impact neurotransmitter levels and, consequently, athletic performance? Can monitoring energy availability, neurotransmitter levels, and psychological factors provide insights into physiological and psychological adaptations to intense training? Researchers will compare results obtained before the exercise test with those taken immediately after and following a 1-hour recovery period to assess changes in performance, biochemical markers, and psychological responses. Participants will: * Engage in a standardized exercise test. * Undergo assessments of energy availability, neurotransmitter levels, and performance at multiple time points (pre-exercise, immediately post-exercise, and post-1-hour recovery). * Complete psychological questionnaires assessing stress levels, recovery, and energy availability. This study aims to identify potential links between energy status, biochemical responses, psychological well-being, and athletic performance, allowing for targeted interventions to optimize training outcomes.