Final answer:
The athletic trainer should assess the equipment, consult with experts, and obtain informed consent when modifying equipment to limit liability.
Step-by-step explanation:
The athletic trainer should take certain actions to limit liability when modifying equipment for a patient. First, they should assess the equipment and identify what modifications are needed to ensure a proper fit. Next, they should consult with other healthcare professionals or experts to ensure that the modifications are safe and appropriate. Additionally, the trainer should document the modifications made and obtain the patient's informed consent.