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Your morning bowel movement starts at bedtime.

Reviewed by Dietitian Madeline Peck, RDN, CDN

Key Points

• Consistent, quality sleep supports gut health and promotes regular bowel movements in the morning.
• A set bedtime routine helps align circadian rhythms, aiding digestion and morning bowel regularity.
• Eating plenty of fiber, staying hydrated and after-dinner walks promote regularity.

Keeping things regular does not begin and end with your morning coffee. While many people are focused on how to optimize their morning routine to help get things moving, research shows that tweaking certain evening habits can be just as important for digestive health. That is why a consistent bedtime helps promote better morning bowel movements. “Sleep and digestion are connected more than you’d think,” says Catherine Ngo, M.D. “Consistent, high-quality sleep helps the digestive system maintain predictable patterns of motility, which supports regular bowel habits.”

To learn more about the importance of a consistent sleep schedule for bowel regularity, we spoke with gastroenterologists who share how and why sleep can help facilitate a morning poop.

Helps Promote Quality Sleep

The relationship between sleep and digestive health is multifaceted, involving both sleep duration and quality. Research shows that the quality and duration of your sleep impact your gut microbiome, the ecosystem of microbes living in your gut.“When sleep schedules are irregular or sleep quality is poor, those normal digestive schedules can become irregular, increasing the chance of constipation, bloating and other GI discomforts,” Ngo says. Even short-term sleep deprivation has been shown to disrupt circadian rhythms and gut motility. The relationship can also go in reverse, as the gut microbiome can impact the body’s circadian rhythm, also known as your body’s natural internal clock.

If sleep deprivation is not an issue, staying up too late can negatively impact circadian rhythms and possibly your ability to poop in the morning, explains Rucha Shah, MD “When people are staying up really late, those cortisol levels are spiking at times that they’re not normally used to…and so then it creates this pattern where digestion gets thrown off.” Shah points out that in her clinical practice, this is why she often sees people who work night shifts experience inconsistencies in their bowel patterns.

Helps Support a Relaxed Morning

Have you ever noticed that when you’re rushing to get ready in the morning, you’re less likely to poop? According to Ngo, this isn’t a coincidence; it’s a gut-brain mechanism. “If rushed in the morning, you don’t have the time to relax and let the bowels evacuate,” she explains. “The mechanics of a bowel movement require you to be able to relax your sphincters,” adds Shah. Both experts warn that when there is no time to relax in the morning, this can lead to anal retention over time, which makes it difficult to poop by training your body to ignore the urge to ‘go’.

Honoring the same bedtime each night can increase your likelihood of waking up on time the next morning, feeling more rested and less rushed. This means you are less likely to hit ‘snooze’ on your alarm, which can allow for more time to get ready in the morning.

Going to sleep and waking up at the same time every day may also help establish predictability and safety in your nervous system, on a subconscious level. “This predictable routine allows the digestive tract to anticipate periods of rest and activity, making it easier for the colon to move stool forward overnight and prepare for a morning bowel movement,” Ngo explains.

Expert Tips for Regular Bowel Movements

• Use a Stool: Shah explains that using a stool to elevate your knees above your hips while sitting on the toilet can make it exponentially easier to poop because it opens the sphincters involved in a bowel movement.
• Hydrate During the Day: Hydration is foundational for bowel regularity because it helps keep stools lubricated and moving through your gut. However, when it comes to optimizing your sleep, the timing of your fluid intake can make a difference. “Hydrate throughout the day including the evening, but not right before bed,” advises Ngo. Drinking excessive amounts of water right before bed  may result in interrupted sleep from having to urinate in the middle of the night.
• Include High-Fiber Foods: Fiber and fluids work in tandem to help make poops easier and more complete. Gradually bumping up your fiber intake with foods like beans, nuts, fruits, veggies and whole grains can support a healthy gut microbiome while bulking up your stools, making it easier to poop.
• Go for an After-Dinner Walk: “If possible, allowing time to go for an after-dinner walk will help stimulate stomach emptying and intestinal forward flow,” Ngo advises. She highlights that light walking, about 10 to 20 minutes after meals, helps gently activate your gastrocolic reflex and support healthier bowel regularity.

Our Expert Take

Your quality and duration of sleep are directly cor to the state of your gut health, both directly and indirectly. Sleep impacts the health of your gut microbiome and your circadian rhythms, which are part of the gut-brain connection that impacts bowel movements. Sticking to a set bedtime routine is an underrated late-night habit that, especially when followed consistently alongside other healthy habits, can help make it easier to poop the next morning. If your constipation isn’t responding to diet and lifestyle interventions, consult with your health care providers for a more comprehensive and customized treatment plan.