Abstract Background The purpose of this study was to show how participation in leisure-time physical activity changes between ages 13 to 23. and to what extent engaging in specific types of sports tracks into young adulthood. Methods The sample comprised 630 subjects who responded to questionnaires at age 13. with seven follow-ups over a 10-year period in the Norwegian Longitudinal He... https://unitedssports.shop/product-category/accessories/