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1. Normal Pubertal Development Boys, on the other hand, lose body fat early in puberty until their growth spurt. With the growth spurt, boys begin to accumulate fat, but not as great as that noted in girls at a similar stage of development. Likewise, boys accumulate muscle mass and overall body weight at an accelerated rate until they reach their peak height velocity. After the peak height velocity, lean body mass continues to be added, but at a slower pace than during the growth spurt. |
Thus,
for boys there is an inflection point on the weight curve around 14 years
of age, after which weight continues to accrue, but more slowly. |
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| Similar to girls, there is a large difference between the rate at which weight is gained at the extremes of percentiles for boys: | |
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between
the age of 13 and 14, boys at the 5th percentile gain less than 8 lbs ... |
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while those at the 95th percentile gain more than 17 lbs. |
