I kept waking up at 3 a.m. until a doctor pointed out 3 daytime mistakes robbing me of deep sleep — here's how I fixed them

Picture this: you're mentally exhausted but unable to fall asleep. Even when you do finally drift off, you wake up at 3 a.m., staring at the ceiling, unable to return to slumber. That was my reality for months until a sleep specialist explained that the coping mechanisms I used to get through the day were likely contributing to my 3 a.m. wake-ups.

Here's how sleep experts Dr. Ana Casas, a longevity and internal medicine specialist, and Dr. Shelby Harris, a Board-Certified Clinical Psychologist at Better Sleep, explain sleep pressure and why it's crucial for falling asleep and staying asleep through the night.

Sleep pressure is your brain's natural hunger for sleep, similar to how your body becomes hungrier for food as you go without it. This hunger increases the longer you stay awake, alongside our circadian rhythm or internal body clock. When sleep pressure is high and aligned with our natural circadian rhythm, we're more likely to fall asleep easily, move through the appropriate sleep stages, and stay asleep throughout the night.

However, I unknowingly made three daytime mistakes that were robbing me of deep sleep and sleep pressure. Experts say these are common mistakes that can sabotage a good night's rest:

1. Not making time for daily movement. Even when you feel mentally drained, incorporating movement into your day can help build sleep pressure. Light exercise, walking, or taking breaks in natural daylight can support restorative sleep at night.

2. Consuming caffeine too late in the afternoon. Caffeine blocks adenosine receptors in the brain, masking our natural sleep pressure. It's important to avoid caffeine late in the day, as it can still circulate in your system for 3-7 hours afterward.

3. Spending too much time in bed. Sleeping in or napping excessively can reduce the time you spend awake, preventing sufficient sleep pressure from building. Sticking to a consistent sleep schedule is key for allowing sleep pressure to accumulate.

To increase sleep pressure for deeper sleep, these experts recommend these four tips:

1. Stick to a consistent sleep schedule, like the 7:1 sleep rule, to regulate your circadian rhythm and optimize sleep pressure. Wake up and go to bed at the same time every day, even on weekends.

2. Get plenty of morning light to stimulate wakeful hormones like serotonin, which converts to melatonin at night to help you fall asleep faster.

3. Limit naps, especially late in the day, as they can cause sleep pressure to plummet and make it harder to fall and stay asleep at night.

By addressing these daytime mistakes, you can build the right conditions for sleep pressure to increase, leading to quicker sleep onset and uninterrupted sleep throughout the night.