Age-specific correlation analysis of longitudinal physical fitness levels in men. - Beunen,G.; Lefevre,J.; Claessens,A.L.; Lysens,R.; Maes,H.; Renson,R.; Simons,J.; Vanden Eynde,B.; van Reusel,B.; van den Bossche,C. (Eur J Appl Phys, 1992)