4 | 115 The transition to adulthood: A game changer!? in sport than those who had not experienced such an event. Specifically, the sport frequency of respondents not in full-time education and those working more than 32 hours a week in both waves was, respectively, 45% (Exp(B)=0.550) and 8.7% (Exp(B)=0.913) less than that of their counterparts. In addition, the sport frequency of respondents engaged in an intimate relationship and those who had formalised a relationship through cohabitation or marriage was, respectively, 13.9% (Exp(B)=0.861) and 18.3% (Exp(B)=0.817) less than that of singles and those without a formalised relationship. Last, parents participated 23.6% (Exp(B)=0.764) less often in sport than non-parents. All of the major life events also negatively affected within-person changes in sport frequency. In line with our expectation, we observed significant decreases in sport frequency when a major life event occurred between the two waves. Sport frequency decreased by 18.1% (Exp(B)=0.819) when a person left full-time education, and it fell by 16.2% (Exp(B)=0.838) when someone began working more than 32 hours a week. Additionally, for those who entered and formalised an intimate relationship, sport frequency decreased by, respectively, 15.2% (Exp(B)=0.848) and 17.5% (Exp(B)=0.825). Finally, sport frequency decreased by 23% when a person became a parent (Exp(B)=0.770). Gender differences Additional analyses of the interaction effects between major life events and gender indicate that the between-effects of work on the number of sports and sport frequency are negative for men, but positive for women. Working male respondents practised 13.9% fewer sports (Exp(B)=0.861; p=0.002) and participated 26.9% less frequently (Exp(B)=0.731; p=0.000) than non-working males, whereas working female respondents practised 9.9% more sports (Exp(B)=1.099; p=0.000) and participate 21.9% more frequently (Exp(B)=1.219; p=0.000) thantheirnon-workingcounterparts.Wealsofoundgenderdifferences for two other between-effects (yielding statistically significant interactions), but only in the effect sizes and not in the “direction”: being in a relationship had a stronger negative effect on the sport frequency of men, and being a parent had a stronger negative effect on the number of sports practised by women. None of the within-effects of the life events differ between men and women.