Strengthening your anal sphincter is primarily done through targeted pelvic floor exercises, consistent bowel habits, and dietary adjustments that reduce strain. Most people notice meaningful improvement within 4 to 6 weeks of daily practice, with more significant gains appearing around 8 to 12 weeks.
Before diving into specific techniques, it helps to understand what you’re actually working with. You have two sphincter muscles. The internal anal sphincter works automatically, tightening and relaxing on its own based on nerve signals from your rectum. The external anal sphincter is the one under your conscious control, and it’s the muscle you can actively train. Both sphincters share the job of maintaining continence, but your external sphincter is where exercise makes the biggest difference.
Pelvic Floor Exercises (Kegels)
Kegel exercises are the single most effective thing you can do at home to build sphincter strength. The movement is simple: contract the muscles you’d use to stop passing gas or to cut off your urine stream mid-flow. That squeeze targets the pelvic floor and the external anal sphincter directly.
Start by holding each contraction for 3 to 5 seconds, then relaxing for 3 to 5 seconds. Repeat this cycle 10 to 15 times. As the muscles get stronger, gradually work up to 10-second holds with 10-second rest periods. Aim for at least 30 to 40 repetitions spread throughout the day, broken into two or three sets. Mix in some “quick flicks” as well: short 2- to 3-second squeezes and releases that train the fast-twitch muscle fibers responsible for sudden tightening when you cough or sneeze.
The most common mistake is engaging your abs, thighs, or glutes instead of isolating the pelvic floor. If your stomach is visibly tightening or you’re holding your breath, you’re recruiting the wrong muscles. Try doing the exercise while sitting or lying down so it’s easier to focus. You should feel a lifting and tightening sensation deep in the pelvis, not a bearing-down pressure.
Biofeedback-Assisted Training
If you’re not sure whether you’re doing Kegels correctly, or if you’ve been doing them for weeks without improvement, biofeedback therapy with a pelvic floor physiotherapist can make a real difference. During a session, a small sensor provides real-time feedback on your muscle contractions, showing you exactly when you’re squeezing the right muscles and how strong the contraction is. This takes the guesswork out of the exercise entirely.
Biofeedback also trains coordination, not just raw strength. It helps you learn to sense when stool is ready to be released and to contract quickly enough to delay a bowel movement when you need to. In clinical studies of pelvic floor muscle training guided by biofeedback, roughly 80% of patients showed successful outcomes after completing a 3-month program. That success rate is considerably higher than what most people achieve with unsupervised exercise alone, which makes biofeedback worth pursuing if self-guided Kegels aren’t producing results.
Bowel Retraining
Strengthening the sphincter isn’t only about muscle power. Teaching your body to follow a predictable bowel schedule reduces the number of times your sphincter has to perform under pressure. Bowel retraining involves sitting on the toilet at a consistent time each day, typically after a meal, when the body’s natural digestive reflexes are strongest. Over time, this conditions your rectum to empty on a reliable schedule, giving you more control and fewer urgent episodes.
The key is patience and consistency. It can take several weeks for the pattern to become automatic. During this period, don’t strain or rush. Simply sit for a few minutes at your designated time, whether or not you have a bowel movement, to establish the routine.
Diet and Stool Consistency
Your sphincter’s job gets much harder when stool is too loose or too hard. Loose, watery stool is difficult for even a healthy sphincter to contain. Hard stool forces excessive straining that can weaken the pelvic floor over time. The goal is a soft, formed stool, which corresponds to a 3 or 4 on the Bristol Stool Scale (a smooth sausage shape, with or without minor cracks).
Fiber is the primary tool for achieving this. Research from the Agency for Healthcare Research and Quality shows that fiber intake above 30 grams per day has the strongest association with optimal stool softness. Below that threshold, adding fiber has a relatively small effect. Above it, each additional gram continues to soften stool in a clinically meaningful way. Most adults eat around 15 grams of fiber daily, so reaching 30 grams typically means deliberately adding high-fiber foods like beans, lentils, oats, berries, and vegetables, or using a fiber supplement like psyllium husk.
Hydration matters too. Fiber absorbs water to form bulk, so increasing fiber without drinking enough fluid can actually make constipation worse. There’s no magic number, but aiming for consistent water intake throughout the day keeps things moving smoothly.
When Exercises Aren’t Enough
For some people, the sphincter muscle or its nerve supply has been damaged by childbirth, surgery, radiation, or neurological conditions. In these cases, Kegels and dietary changes alone may not restore full continence. If you’ve been consistent with pelvic floor exercises and bowel management for 8 to 12 weeks without meaningful improvement, more advanced options exist.
Sacral neuromodulation is a procedure where a small device sends gentle electrical pulses to the nerves that control the sphincter and rectum. It’s specifically designed for people who haven’t responded to conservative treatments. A trial period lets you test the device before committing to a permanent implant. Posterior tibial nerve stimulation is a less invasive alternative that works through a nerve near the ankle to indirectly modulate the same pelvic nerve pathways. Sessions typically last 30 minutes and are repeated over a series of weeks.
These interventions don’t replace exercise. They work alongside it, improving the nerve signaling that makes muscle contractions more effective. Most specialists will want to see that you’ve genuinely committed to pelvic floor training before recommending either option.
Realistic Timeline for Results
Consistency matters more than intensity. Doing 30 to 40 Kegels every day, spread across multiple short sessions, is far more effective than doing 100 in one sitting once a week. Most people begin noticing better control within 4 to 6 weeks of daily practice. This might show up as fewer urgent episodes, less leakage during physical activity, or simply a stronger sense of being able to “hold on” when needed.
More significant improvements, like full resolution of leakage or a noticeable change in muscle tone during a clinical exam, typically take 8 to 12 weeks or longer. The muscles involved are small and fatigue-resistant, which means they respond to sustained, moderate training rather than short bursts of intense effort. Once you’ve built strength, continuing a maintenance routine of 10 to 15 daily contractions helps preserve your gains long term.