Research suggests that specific leisure interventions enhance feelings of SWB. This is both a top-down and bottom-up effect, in that leisure satisfaction causally affects SWB, and SWB causally affects leisure satisfaction. This bi-directional effect is stronger in retired individuals than in working individuals. Furthermore, it appears that satisfaction with our leisure at least partially explains the relationship between our engagement in leisure and our SWB. Broadly speaking, researchers classify leisure into active (e.g. volunteering, socializing, sports and fitness) and passive leisure (e.g. watching television and listening to the radio). Among older adults, passive leisure activities and personal leisure activities (e.g. sleeping, eating, and bathing) correlate with higher levels of SWB and feelings of relaxation than active leisure activities. Thus, although significant evidence has demonstrated that active leisure is associated with higher levels of SWB, or happiness, this may not be the case with older populations.