Does Knowledge About Physical Activity Translate into More Active Populations?

<b>Background:</b> Physical activity has a number of benefits; however, the consequences of inactivity can have a negative impact on individuals and health and social care services. Increasing knowledge can play an important role in helping sustain behaviours that can lead to health benefits, reduce barriers and increase participation in physical activity while having a greater impact on public health policy. The aim of this study is to explore knowledge about physical activity benefits, levels of activity, awareness of risks of inactivity, sources of information about the benefits and the relationship between knowledge about physical activity recommendations and activity levels. <b>Methods:</b> A cross-sectional survey involving adults over 18 years old in Northern Ireland (weighted sample n = 2201) and Ireland (weighted sample n = 1279) was commissioned by the Institute of Public Health in 2021 to explore knowledge about health benefits and the association between knowledge and physical activity levels. Descriptive statistics in percentages were used to demonstrate the findings, while chi square tests of independence were used to examine if a significant relationship between activity and knowledge existed. <b>Results:</b> Only 4 out of 10 respondents knew the recommendations of at least 150 min weekly of physical activity. A chi square test of independence showed that the relationship between knowledge about recommendations and activity was significant (χ2(1, n = 3506) = 20.25, <i>p</i> < 0.001, not weighted). There was a sex difference in the association of knowledge about the recommended guidelines and activity levels. Women were more knowledgeable about many of the health benefits of physical activity but were less active than men. <b>Conclusions:</b> Overall, getting the adult population more active remains a challenge in public health promotion; however, knowledge alone does not equate to action. Therefore, it is essential to understand and address the range of challenges to increasing physical activity to ensure the needs of the whole population are met.