Which three systems do the health action model think are important for the healthy behavior that individuals are prepared to follow?

The model holds that belief system, motivation system and social norm system play an important role in the healthy behavior that individuals are prepared to follow.

Belief system refers to the results and beliefs of individuals taking healthy actions, that is, the degree of recognition and trust in healthy behaviors; Motivation system refers to the internal motivation that urges individuals to adopt healthy behaviors, including their needs, cognition, interests and values for healthy behaviors. Social norm system refers to the binding force from the society, that is, the society's requirements, support and supervision of individual health behavior.