If AROM is strong and pain-free, what does this indicate?

When active range of motion (AROM) is both strong and pain-free, it indicates that there is likely no contractile tissue lesion present. In this context, strong AROM suggests that the muscles are functioning well and are capable of generating appropriate force without any signs of weakness or impairment. The absence of pain further reinforces the idea that the tissue is not compromised, as pain during movement typically indicates some form of injury or lesion in the contractile structures, such as muscles or tendons.

The other options consider potential issues that would demonstrate symptoms during AROM. Muscle strains typically produce weakness and pain with movement. Tendinopathy, often marked by pain especially when the tendon is loaded or stretched, would likewise show discomfort during active motion. Joint instability can lead to a lack of strength and may also cause pain or give-way during movement. Therefore, the strong and pain-free performance during AROM is a clear indicator that the contractile structures are intact and functionally sound.