Difference between impairment and activity limitation; how should language be used in documentation?

• A. Impairment is a task difficulty; activity limitation is a body function loss.
• B. Impairment is a body function loss; activity limitation is difficulty performing tasks.
• C. They mean the same in PT; docs can interchange.
• D. Impairment refers to patient satisfaction.

Answer: (B)

Impairment refers to loss or abnormality of body function or structure, while activity limitation refers to difficulty performing tasks or actions. The correct option reflects this distinction: an impairment is a body function loss (like reduced range of motion, weakness, or sensory loss), whereas an activity limitation is about how that impairment makes it hard to carry out everyday tasks (such as reaching overhead or dressing). These terms come from the ICF framework, which separates body-level problems from activity-level challenges to keep documentation precise and meaningful.

In practice, describe impairments in objective, measurable terms (for example, “loss of active shoulder ROM with flexion to 120 degrees” or “proximal muscle weakness rated at 3/5”). Describe activity limitations by the tasks that are difficult for the patient (for example, “difficulty donning a shirt due to limited overhead reach”). Use person-first, neutral language rather than labeling the person as “impaired,” and avoid conflating the patient’s experience with the condition itself.

Why the other ideas don’t fit: one mixes up the definitions by swapping body function loss with task difficulty, another claims they’re the same, and another incorrectly ties impairment to patient satisfaction rather than function.