In relation to aspects of health-related quality of life, findings indicated that those participants who engaged in less than 8 hours of sedentary behavior per day on weekdays had significantly higher levels of vitality and mental health compared with those who engaged in greater than 8 hours per day. Findings also indicated a large effect of sitting less than 8 hours per day on higher levels of vitality and mental health. There is limited research examining the links between aspects of health-related quality of life and sedentary behavior yet our findings support a prospective cohort study conducted with older adults . They found significant increases in levels of vitality across decreased sitting time yet the measure of sedentary behavior was self-report and focused on sitting time during leisure activities as opposed to the waking day as in the current study. Understanding how and why sedentary behavior could influence mental well-being (e.g., depression, anxiety and vitality) is an area of research that is lacking and needs further attention.