I can't tell you how many times over the past 15 years I've said "I'm a light sleeper." My kids are grown with kids of their own, but I remember as far back as the 70's, when my first son was born, how I would wake up quickly and thoroughly when they would make even the slightest sound. It's 'mother's intuition' or 'mother's hearing,' as some call it. But in the last 15 years I've come to accept this 'light sleeper' thing as simply remnants of that 'mother's hearing,' due in part to the fact that this works with my pets as well. Just the slightest sound, especially when it sounds 'wrong'... I awaken.
Over the past 6 years or so, at a guess, my sleep patterns have gotten significantly 'off,' leaving me to awaken at ANY sound. A car passing by my house, the sound of neighbors' voices, rain, thunder, someone just being awake in the same house I'm in, someone using the restroom... I can't really think of much that WON'T wake me. And very recently I've come to discover the effects of this sort of sleep is cumulative and damaging.
Several months ago I purchased a machine called a ResMed S+ at Bed, Bath & Beyond. ResMed is the company that makes CPAP machines and masks, and they made this device to help people measure the quality of sleep, help them fall asleep, and also to help them improve their quality of sleep. What I discovered by using the S+ surprised and shocked me in many ways. Using a scoring system, with 100 being the best score, I realized just how poor my sleep quality was.
Then I saw a pulmonologist who ordered, among other things, a sleep study where I discovered I have mild sleep apnea.
While the S+ couldn't tell me if I stopped breathing or how many times, it did measure REM, Light, and DEEP sleep, as well as how long it takes me to fall asleep on any given night. The score is presented each morning.
The image at the top of this entry is a recent score from a couple of days ago. This is not the worst score I've gotten--not even close.
As you can see, my DEEP sleep is incredibly short at 16 minutes. That's BAD. It should be closer to 1 1/5 hours. REM sleep, on this particular night, isn't all that bad, really, as I've seen it as low as 15-20 minutes. And LIGHT sleep always seems to dominate my sleep--also not good.
During light sleep a person is actually aware of their surroundings; sound, light, movement, etc. And yes, this is why some people wake up easily--because they stay mostly in a state of LIGHT sleep. This is not restorative sleep, btw. REM mostly restores the mind, and DEEP mostly restores the body. It's all quite important.
Again, what this machine does NOT show is the little awakenings, cessation of breathing, and other neurological events like restless leg syndrome, even teeth grinding!, which often comes with sleep apnea. What it does actually show, however, is how many times I woke up completely and totally. A person may or may not know they woke up every time, depending on how tired/sleepy you are. So what's so telling about this?
Well, in MY case, as this ONE example shows, I woke up 8 times in one night; I've had many nights where this number has been as high as 14. And remember, this is not counting the micro awakenings or cessation of breathing. However, a sleep study has a very complex system of monitoring so that they can find the micro-awakenings, cessation of breathing, and so on. In mild sleep apnea, for example, events happen 5-10 times PER HOUR. In severe sleep apnea this can happen hundreds of times per hour. Mild or severe, this can cause hypertension, heart attack, and stroke.
Basically what this means is---if you find yourself telling people you're a light sleeper, if sounds, movements in the bed, etc. wake you easily, and especially if you have symptoms of sleep apnea, you may want to consider bringing this up to your doctor; It could actually save your life!
In my personal case, I was actually quite amazed at how i felt after the second sleep study I had using a CPAP machine. I felt pretty darn good the following day. And while I'm having issues with my skin being tender and sensitive to the mask, etc., I know I'm going in the right direction.
Sleep apnea can cause heart arrhythmias such as Atrial Fibrillation--which is known for causing stroke. Sleep apnea can also cause various other heart conditions including, but not limited to, congestive heart failure. And if THAT isn't enough, do know that it can cause weight gain, muscle fatigue, back pain, joint pain not unlike that which comes with arthritis.. and more.
Do you snore? That's a tell-tell sign of sleep apnea, btw. Tired, sleepy during the day, snoring at night, fatigue... please listen to your body.
