Prospective and retrospective longitudinal studies of the growth, maturation and fitness of Polish youth active in sport - Malina, R. M.; Woynarowska, B.; Bielicki, T.; Beunen, G.; Eweld, D.; Geithner, C. A.; Huang, Y. C.; Rogers, D. M. (International Journal of Sports Medicine, 1997)
Keywords: youth; physical development; longitudinal study; performance capacity; junior elite sport; Poland; USA; biological and medical sciences; junior sports