If a light sleeper could be wakened by a pin dropping 300 feet away, you’d think that most or at least many apnea events would jolt the sleeper to full wakefulness.

Light sleepers have been known to awaken at the slightest sound. So how is it that they can sleep through being choked?

“The answer may be embedded in your question,” says Joseph Krainin, MD, board certified in sleep medicine and neurology and founder of the online sleep apnea clinic Singular Sleep.

Dr. Krainin explains, “In many cases, ‘light’ or non-restorative sleep is due to sleep apnea. The breathing events are waking you up and preventing you from achieving consolidated, refreshing sleep.”

But wait a minute here. If you’re being awakened—and that could mean dozens of times an hour—how could you sleep through all of this?

Dr. Krainin says, “Most of the time the obstructive breathing events result in very short brain awakenings called ‘arousals’ that only last a few seconds and, therefore, are too short to get stored in conscious memory.”

It’s amazing nevertheless that a person could sleep through a repeatedly blocked windpipe that causes a struggle to get in air.

But it happens, which is why many people with obstructive sleep apnea deny that they could have this problem – even if they can’t get through the day without frequent or long naps.

Being a light sleeper may very well be predictive, to some extent, of the presence of obstructive sleep apnea.

In fact, do you blame your light sleeping on being awakened every night at least twice to empty a nearly full bladder?

Do you ever think, “If only I wasn’t such a light sleeper, I could sleep through the urge to urinate”?

News flash: Sleep apnea could be the reason why you keep waking up to urinate – because sleep apnea causes a cascade of events that culminate in the kidneys dumping urine into your bladder!

If you’re a very light sleeper AND can’t get through the night without visiting the loo at least twice, this duo is a big red flag for obstructive sleep apnea.

In 2013 Dr. Krainin was elected a Fellow of the American Academy of Sleep Medicine, an honor reserved for sleep doctors who’ve made significant contributions to the field in education, research and service.