Final answer:
To maintain proper hand and arm positioning while waiting for a sterile procedure to begin, keep your hands in a palm forward position and keep the arms relaxed and comfortable.
Step-by-step explanation:
To maintain proper hand and arm positioning while waiting for a sterile procedure to begin, it is recommended to keep your hands in a palm forward position. This helps minimize the risk of contaminating the hands. Additionally, it is important to keep the arms relaxed and in a comfortable position to avoid any unnecessary movements that could potentially introduce contaminants.