That's Fit

If your kid has a big neck, he or she may be more likely to develop a sleep-related breathing disorder, say researchers at the University of Virginia. Translation for big: Obese.

Of 215 children, ages 18 months to 18 years, who were referred to a pediatric sleep clinic, 37.3 percent were obese and snored more than not-so-heavy kids, says this Virginia study. Basically, neck size showed a strong inverse correlation with oxygen saturation and was an even better indicator of breathing problems than BMI, weight, or tonsil size.

One implication of this finding, says study author Dr. Pearl L. Yu, is this: "Children with bigger neck sizes for age should be queried about snoring, apnea, excessive sleepiness, and hyperactivity. Neck size should be considered in the clinical evaluation of children with a history of snoring and apnea."

The most common type of childhood sleep disorder is obstructive sleep apnea (OSA) -- it occurs when the tissue in the back of the throat collapses and blocks the airway -- which occurs in about two percent of young children and is common among obese kids. In early childhood, OSA can slow a child's growth and if untreated, can cause high blood pressure.