5J. Loko,T. Sik kut. Sensitive periods in physical develop-ment [J]. University of Tartu,Estonia,1994.
6Balyi I,Hamilton A. Long-term athlete development :trainability in childhood and adolescence [ J ]. OlympicCoach, 2004, 16(1) : 4-9.
7Bompa,T. From childhood to champion athlete[ J]. WestSedona,AZ ; Veritas Publishing,1995.
8Gollin-Saltin,A. S. Skeletal muscle development in the hu-man foetus and during childhood. In K. Berg, &B. Eriks-son ( Eds) ,Children and exercise,1980:217 -218.
9Ford P,De Ste Croix M,Lloyd R, et al. The long-termathlete development model : Physiological evidence andapplication [ J ] . Journal of Sports Sciences, 2011, 29(4): 389 -402.
10Bailey R, Collins D, Ford P,et al. Participant develop-ment in sport : An academic review [ J ] . Sports CoachUK, 2010,4: 1 -134.