This unit considers the principles involved in the analysis and adaptation of self-care, work, leisure activities and occupations to understand their components parts, their possible meanings to clients, and their therapeutic potential to promote the wellbeing of individuals and groups. Biomechanical and cognitive principles involved in the everyday activities of people who need to adapt to changes in their functional abilities are examined. Clinical reasoning, ethical and legal requirements for accurate reporting, and the documentation of assessment and intervention outcomes are reviewed.