Inclusion Criteria:

• female sex,
• age 16 to 35 years,
• good general health condition and well-being,
• regular menstrual cycles,
• written informed consent to participate in the study before its commencement,
• at least a high level of training status,
• at least 4 years of training experience in basketball,
• participation in at least 3 basketball-specific training sessions per week,
• participation in at least 1 basketball game per week.

Exclusion Criteria:

• male sex,
• use of hormonal contraceptives,
• current injury or musculoskeletal condition limiting participation in training or competition,
• health-related or medical contraindications, including menstrual disorders, planned pregnancy, or anemia,
• use of supplements within 3 months before the study, except for regular use of protein supplements, carbohydrate supplements, or isotonic drinks,
• failure to meet the study protocol assumptions or unwillingness to follow study procedures.