average weight gain for girls
Girls gain, on average, more fat than boys during the interval of their growth spurt -- 3 kg (6 pounds) versus 1.5 kg (3 pounds). Adapted from R.M. Malina and C. Bouchard (1991); Growth, Maturation, and Physical Activity; Champaign, IL; Human Kinetics.hey occur, on average, several months after the period of peak height velocity. During the interval of maximum growth in height (about 11-13 years in girls and 13-15 years in boys) girls gain about 7 kg (15 pounds) in fat-free mass, boys gain double this value, about 14 kg (31 pounds).