Inheritance of physical fitness in 10-yr-old twins and their parents - Maes, H. H.; Beunen, G. P.; Vlietinck, R. F.; Neale, M. C.; Thomis, M.; Eynde, B. V.; Lysens, R.; Simons, J.; Derom, C.; Derom, R. (Medicine & Science in Sports & Exercise, 1996)