2.3. Experimental Protocol
Once participants met all inclusion criteria and signed a parental informed consent form, they were advised to avoid all types of caffeinated food and drink (coffee, tea, chocolate, etc.) until the experiment was completed. Participants were then instructed to do the following 24 h before each experimental trial: (a) maintain their regular training load and avoid strenuous physical activity; (b) consume and replicate similar meals and drinks; (c) avoid any other stimulant substances, or Caff intake in the 24 h prior to the experiment; and (d) sleep at least 7 h the night before the test. Data from the Arabic version of the Pittsburgh Sleep Quality Index (PSQI) questionnaire were used to determine the player’s sleep parameters during the entire three test periods [