Which of the following describes the expected end-feel for supination during elbow AROM testing?

For elbow active range of motion (AROM) testing, supination typically presents a firm end-feel. This firm end-feel occurs due to the tension in the surrounding ligaments and soft tissue as the joint reaches its maximum range of motion. When assessing supination at the elbow, you can feel a resistance that is characterized by a strong, elastic quality, which is indicative of the joint capsule being taut rather than simply compressing soft tissues or meeting a bony block.

Other options do not accurately reflect the characteristics of the end-feel for this specific motion. A soft end-feel would suggest the presence of more compressible tissues, typically found at joints with a larger range of motion or significant soft tissue interaction. A hard end-feel might indicate a bony block or disruption, while a loose end-feel would typically describe a situation where there is excessive joint movement or instability, neither of which apply to the controlled motion of supination in a healthy elbow joint. Therefore, the firm end-feel is the correct choice, embodying the normal anatomical constraints that occur during supination.