During a routine health assessment, a nurse provides education on the importance of health promotion for a 35-year-old client. The focus is on the need for regular health screenings, nutrition, and lifestyle changes. In a recent study, it was found that only ______ of adults aged 18 to 65 engage in sufficient physical activity weekly. This statistic highlights the challenges faced in promoting health within this age group and the need for interventions that address lifestyle habits.