What was the age range of participants in the Sallis et al. 1999 study?

The Sallis et al. 1999 study focused on individuals aged 18-29 years, which is why this age range is the correct answer. This age group is particularly significant in research on exercise and health because it encompasses young adults who are transitioning into greater independence and often starting to establish lifelong habits related to physical activity. The findings in this demographic can have implications for interventions aimed at promoting physical activity as they develop their own routines and lifestyle choices. Understanding behavior patterns in this age range helps researchers and health professionals tailor strategies to improve activity levels and overall health outcomes in young adults.