Samira is a 19-year-old student who wants to incorporate regular physical activity into her lifestyle for improved fitness and well-being.

Samira's health professional helped her put together a simple exercise routine and add it to a fitness app she can follow along.

According to the Theory of Planned Behaviour, the health professional's recommendation aligns with which of the three main factors that could influence Samira's intention to engage in regular physical activity?

Theory of Planned Behaviour (simplified)

Behavioural beliefs   →   Attitude

Normative beliefs     →   Subjective norm

Control beliefs       →   Perceived behavioural control

         -Attitude + Subjective norm + Perceived behavioural control

                                   ↓

                              Intention

                                   ↓

                              Behaviour