[muffinman26]

Sleep apnea often develops during puberty when the voice box changes, which lines up with the high-school timeframe. Being overweight can certainly make it worse, but apparently an above-average number of firefighters have sleep apnea, and they're not exactly an overweight group.

Not saying you have sleep apnea or that sleeping on your side/belly isn't enough to deal with it, simply some information.

(It's certainly possible that the reason an above-average number of fire-fighters have sleep apnea is that 1) they're more likely to have people hear them snoring, and 2) the people screened out of the military for sleep apnea often respond by becoming firefighters.)