Ever wonder why you just can't seem to sleep in anymore? Experts reveal the real reason why this happens as we age.
There's a reason why older people tend to wake up earlier in the mornings — it's a part of the natural aging process.
“The wiring of the brain is likely not sensing ... and responding to the inputs as well as it should because it’s an aging brain,” said, the director of the Center for Sleep and Circadian Sciences at the University of Arizona Health Sciences. These inputs include sunset, sunlight, meals, social cues and physical activity that help mark where we are in a day.
The nerves that are supposed to give the brain time cues have undergone the same amount of degeneration as the brain, Parthasarathy said. This inability to sense time cues is part of the reason why older people tend to get tired before their children or grandchildren. And, as a result, wake up fully rested and earlier than the rest of the world.
Why does this matter? Since there is less light getting into the eyes because of the vision issues cataracts cause, the body starts to release earlier than it should. For younger people, melatonin “starts rising after sunset,” Parthasarathy said, which is why you generally feel tired a few hours after. For people with cataracts whose brain thinks sunset was earlier, their perceived sunset is earlier, which makes them tired sooner in the evening. And going to bed sooner means waking up earlier.
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