Several things can help you have a bowel movement, from quick fixes like coffee or a change in posture to longer-term habits like eating more fiber and staying active. What works best depends on whether you need relief right now or want to prevent constipation from happening in the first place. Here’s what actually moves things along, and why.
Coffee Works Faster Than You Think
If you need results soon, coffee is one of the fastest natural options. It triggers contractions in the lower colon in as little as four minutes after drinking it. This isn’t just a caffeine effect. Coffee stimulates the release of several gut hormones that increase the urge to go, and decaf coffee produces a similar response in some people. The effect is strongest in the 4 to 30 minutes after your first sip, which is why so many people associate their morning cup with a trip to the bathroom.
Change Your Sitting Position
A small adjustment to how you sit on the toilet can make a real difference. A muscle called the puborectalis wraps around your rectum like a sling, pulling it forward to create a sharp angle that helps you hold stool in. When you sit on a standard toilet, that angle only partially opens. When you raise your knees above your hips, mimicking a squat, the angle widens further and creates a straighter path for stool to pass through.
You don’t need a fancy device for this. A short footstool, a stack of books, or even an upside-down wastebasket under your feet will do the job. Lean slightly forward with your elbows on your knees, and let your belly relax rather than straining.
Fiber: The Long Game That Works
Fiber is the single most reliable dietary change for regular bowel movements, but the type matters. Insoluble fiber, found in whole wheat, vegetables, and nuts, speeds the passage of food through your digestive tract and adds bulk to your stool. Soluble fiber, found in oats, beans, and fruits, absorbs water and forms a gel that softens stool and makes it easier to pass. You need both.
The current U.S. dietary guidelines recommend 14 grams of fiber per 1,000 calories you eat. For most adults, that works out to roughly 25 to 35 grams per day. The average American gets about half that. If your intake is low, increase it gradually over a week or two to avoid bloating and gas. Your gut bacteria need time to adjust.
One important caveat: fiber without enough water can actually make constipation worse. A study of people with constipation who were already eating 25 grams of fiber daily found that drinking about 2 liters of fluid per day increased bowel movement frequency and reduced laxative use, compared to those drinking only 1 liter. Water is what gives fiber its stool-softening power.
Prunes and Prune Juice
Prunes aren’t just an old folk remedy. They contain sorbitol, a sugar alcohol that your body doesn’t fully absorb. Sorbitol draws water into your colon, which softens hard stool and triggers a natural laxative effect. Dried prunes contain more than double the sorbitol of the same serving of prune juice, so eating whole prunes tends to work better than drinking the juice. Three to five prunes (or about half a cup of juice) is a reasonable starting point. Give it a few hours to work.
Movement Helps, but Intensity Matters
Physical activity can shorten the time it takes food to travel through your colon, but the evidence is more nuanced than “just go for a walk.” Research on elderly active men found that even a brief period of physical inactivity noticeably prolonged colonic transit time. Other data shows that higher-intensity light activity (think brisk walking rather than a slow stroll) is associated with faster transit, independent of age, sex, or body fat. Moderate exercise in otherwise healthy men, however, didn’t consistently change transit time in controlled studies.
The practical takeaway: regular daily movement matters more than occasional intense workouts. If you’ve been sedentary, even consistent brisk walking may help get things moving. The mechanical jostling of activity appears to stir colonic contents, which can prompt the urge to go.
Magnesium as a Quick Fix
Magnesium citrate, available over the counter in liquid or tablet form, works as an osmotic laxative. Like sorbitol in prunes, it pulls water into your intestines to soften stool and stimulate a bowel movement. It typically works within 30 minutes to 6 hours. This makes it useful for occasional constipation but not something to rely on daily without a reason, since your body can become dependent on osmotic laxatives over time.
Probiotics for Ongoing Regularity
If constipation is a recurring problem, certain probiotic strains have shown benefits in clinical studies. Bifidobacterium lactis has been the most studied strain for constipation and appears to increase how often you go. Lactobacillus casei Shirota has a broader effect, improving not just frequency but also stool consistency and reducing straining, pain, and that frustrating feeling of incomplete emptying. These aren’t overnight fixes. Probiotics typically need a few weeks of consistent use before you notice a change, and the effects vary from person to person.
Among prebiotics (the fiber that feeds your gut bacteria), inulin, found naturally in chicory root, garlic, onions, and bananas, has the strongest evidence for improving constipation.
A Simple Routine That Covers the Basics
Your colon is most active in the morning, especially after eating. Taking advantage of this natural rhythm can help train more regular habits. Drink a glass of water or a cup of coffee when you wake up, eat a breakfast with some fiber, and give yourself unhurried time on the toilet with your feet elevated. Trying to go at the same time each day helps your body develop a predictable pattern.
If none of these approaches work after a week or two, or if you notice blood in your stool, rectal bleeding, unexplained weight loss, constant abdominal pain, vomiting, fever, or an inability to pass gas, those are signs that something beyond simple constipation may be going on.