Size-Wise: What to Expect with Kids and Their Changing Bodies
January 25, 2012 | In: Child Nutrition
As I work with families (and research/write Fearless Feeding), I get a number of questions that center around the theme “Is this normal?” Periodically, I will write about these and share them here, for your benefit. Of course, if you have questions you want to ask directly, I’d be happy to include and answer them here—just email me.
Lately, I’ve been getting a lot of questions about the distribution of body weight in children– where it goes and what’s normal –so I thought I’d do a brief overview of this.
“She’s got a little extra around the middle and I’m a little concerned about it,” said Dad. “She’s active and seems to eat well—and thankfully she’s not worried about it, but I’m a little concerned.”
In girls, the body prepares for the important job of menstruation by laying down body fat in the area of the tummy. The average age of starting a period is 12.5 years, but this varies with ethnicity and weight status, and can be earlier or later. Once puberty starts (usually around age 10), height growth takes off and girls magically thin out. During this time, you will notice body weight redistribution and the addition of fat tissue–to the rear, hips, breasts, backs of arms, and thighs. This is the normal transformation of child into woman. If you notice extra weight gain overall, more than the normal “pouch” and “filling out” of puberty, it may be an indicator of overweight or obesity.
“My son seems to be the smallest in the class—all the girls are taller than he is! And he doesn’t seem to be getting muscular.”
In general, girls and boys grow at very different rates—girls outpace boys early on, then boys catch up and surpass girls during later adolescence. With this lag behind girls, puberty starts about 2 years later (around age 12) for boys.
Not only do boys get their turn— it lasts longer! It’s true, boys spend more time growing, ending up taller and more muscular than girls. Once puberty hits, and testosterone levels rise, boy’s muscle growth occurs—visibly.
Bottom Line: Boys and girls grow and deposit muscle and fat tissue differently and their overall timing is different. Knowing about normal growth trends can help deter unnecessary corrections (like putting a little girl with a belly on a diet), get you started with additional help if needed (in case of excess weight), and most importantly, calm your fears.
Have you noticed any of these changes in your child’s shape or size?