When people who reach certain age start waking up at 3 a.m., it doesn’t necessarily mean they experience issues with stress or poor sleep habit. On the contrary, one of the main reasons for waking up at this time, is the natural reduction of melatonin, which is the hormone that regulates your sleep-wake cycle.
When you are younger, your melatonin levels remain high throughout the night, which helps you sleep deep. However, as you age, your body produces less melatonin. By the early morning hours, your melatonin levels may be low enough to trigger your brain to wake up, even if you have not slept as long as you wanted or needed.
In short, your body may no longer be receiving the hormonal “stay asleep” call like it used to.
This is often made even worse with light exposure. We also become more sensitive to subtle environmental cues that tell our brain that morning is approaching. This cues include the light reaching to your room from the street lights, the screen of your phone, the lights of the clock, and similar, which further supress melatonin and stimulates your brain into the wake-up mode.
The outcome is that you will be sleeping lighter and shorter, and it’s not because anything is “wrong” with you but simply because your sleep biology has changed over time.
2. Shifts in the internal clock (circadian rhythm)
Another reason for waking up early might be simply because there is a change in your body’s internal clock. This can be seen in the need of going to bed early with age. So when a person goes to bed at around 9 p.m. it’s not unusual for their body to finish its sleep cycle at 3 a.m.
This doesn’t mean you are suffering from insomnia,but it’s your body merely adapting to its internal clock.
The issue is that internal clock doesn’t always match your expectation of how long you should sleep during the night.
This change can especially be felt during the process of certain life transitions, such as when a person retires and is no longer that active during the day, has less social activities, fewer responsibilities, or quieter evenings than before.
Even then, sleep can still feel refreshing and sound, but starts occurring earlier in the evening. When you become aware of how these transitions affect your sleeping, you can start thinking of ways to align your daily habits with the timing of the body.
3. Physical discomfort and health factors
Waking up in the middle of the night can also be a result of physical discomfort you experience during the day. So when the body rests and there are no other distractions, that minor discomfort you experienced during the day may become significant enough to disrupt your sleep cycle.
Some of the most common contributors include joint or arthritis pain, back pain, acid reflux, dry mouth, cramps, and changes in body temperatures.
The most common cause of waking up is the need to use the bathroom. This is because, as a person ages, their bladder becomes much more sensitive. This means that waking up during the night, or even in the early morning, is a common phenomenon.
Medications may also be a cause of waking around 3 a.m. This is because they may increase the amount of urine produced, change body temperatures, and cause light, non-restorative sleep. However, as these changes are gradual, a person may be unable to associate them with physical discomforts or side effects of the medications they are taking.
It is only after talking to a medical expert that a person may be able to realize what is causing them to wake up.
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