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3 | 79 When do young adults stop practising a sport? greater time restrictions, even more so because working hours are mostly fixed. This may make it difficult to create empty time slots in which to practise a sport, especially at a sport club since this is a relatively inflexible form of sport participation that requires a high degree of planning (Van Houten et al., 2014). Thus, it seems likely that a decrease in temporal resources upon the start of employment will result in reduced opportunity to participate in sport (Nomaguchi & Bianchi, 2004). In addition, beginning to work generally leads to an increase of social resources as new, work-related social contacts unfold with colleagues and business relations. As people expand and maintain work-related social networks, the social payoffs of sport participation will likely become less important. This increases the probability of giving up sport activities to partake in work-related activities with a higher social payoff. Both the decrease in temporal resources and the increase in work-related social resources leads us to expect that beginning to work increases a young adult’s risk to stop practising a sport and end a sport club membership. Moving out of the parental home to start living on one’s own marks a new chapter in life for young adults. This new phase is characterised by a new social environment and less reliance on parents and family. Living on one’s own implies a responsibility to take care of oneself: to shop for groceries, cook meals and clean up afterwards. This is likely to reduce available spare time and increase time restrictions. Moving out also alters a person’s social resources, as it often implies relocating to a new physical and/or social environment. The former social network, which was linked to the parental home, loses much of its relevance. New friendships have to be made and maintained within the new environment. Consequently, the social payoffs of continuing activities near the parental home are generally lower than the social payoffs of engaging in activities within the new environment. This especially applies to sport activities, which mostly take place in local settings (Breuer, Hoekman, Nagel, & Van der Werff, 2015). Because of these changes in temporal and social resources we expect that starting to live on one’s own increases a young adult’s risk to stop practising a sport and end a sport club membership. Couples who marry, or move in together, face new responsibilities that come with forming a shared household. Both partners experience the additional resources this provides, as well as the restrictions it imposes (Kraaykamp et al., 2009). For example, couples may decide to divide housekeeping tasks, creating a household economy of scale that increases partners’ spare time. However,

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