Does Exercise Make Hemorrhoids Worse?

Exercise does not universally make hemorrhoids worse, but certain types clearly can. A survey of over 300 athletes found that bodybuilding and cycling stood out as the activities most strongly linked to hemorrhoidal symptoms, while moderate physical activity and good bowel habits appear to be protective. The relationship between exercise and hemorrhoids comes down to what you’re doing, how you’re doing it, and what’s happening inside your abdomen while you do it.

Why Certain Movements Bother Hemorrhoids

Hemorrhoids develop when the cushions of tissue lining the anal canal become swollen, stretched, or displaced downward. These cushions are packed with blood vessels, and they’re held in place by connective tissue that can weaken over time. Anything that repeatedly increases pressure in the veins around the rectum or strains the supporting tissue can accelerate that process.

The key pressure mechanism is intra-abdominal pressure, the force inside your abdomen that spikes when you bear down, hold your breath during exertion, or strain on the toilet. Heavy lifting, especially with a breath-holding technique, can push that pressure to extreme levels. Prolonged sitting on a hard surface compresses the area differently, restricting blood flow and irritating tissue that’s already engorged. These two forces explain most of the exercise-hemorrhoid connection.

The Sports Most Linked to Hemorrhoid Problems

A study of 312 athletes across multiple sports found that about a third reported hemorrhoidal disease overall. But the numbers were far from even across activities. Among those who practiced cycling or horseback riding, 57% reported hemorrhoid symptoms. Among bodybuilders, the rate was 48%. When the researchers controlled for other factors like age, bodybuilding was the only sport that showed a statistically significant independent association with hemorrhoids.

That finding makes intuitive sense. Bodybuilding involves repeated heavy lifts with large muscle groups, which drives up intra-abdominal pressure over and over again during a single session. Cyclists, on the other hand, sit on a narrow saddle for hours, putting sustained mechanical pressure on the perineum and anal area. The mechanisms differ, but the result for hemorrhoid-prone individuals converges: more symptoms, more often.

The Valsalva Problem in Weightlifting

If you’ve ever held your breath and pushed hard during a squat or deadlift, you’ve performed a Valsalva maneuver. It’s the same reflex you use when straining on the toilet or bracing to push something heavy. Closing your airway and bearing down temporarily stabilizes your trunk, but it also sends pressure soaring throughout your abdomen and pelvis.

Researchers measured arterial blood pressure in experienced lifters performing exercises at their maximum load. With a closed-glottis Valsalva, the average blood pressure hit 311/284 mmHg, and one individual peaked at 370/360. Those are staggering numbers, well beyond anything that occurs during normal daily life. When the same lifters performed the identical load while exhaling slowly instead of holding their breath, average pressure dropped to 198/175, a dramatic reduction.

That blood-pressure spike doesn’t just stress your cardiovascular system. It increases pressure on the hemorrhoidal venous plexus, the web of blood vessels inside the anal cushions. If those cushions are already enlarged or their supporting tissue is weakened, the repeated pressure surges from heavy Valsalva lifting can push symptoms from manageable to miserable. It’s worth noting that this doesn’t mean all weightlifting is off the table for people with hemorrhoids. The issue is specifically the combination of very heavy loads and breath-holding, and there are practical ways to reduce the damage.

Why Moderate Exercise Appears Protective

While heavy straining aggravates hemorrhoids, regular moderate physical activity seems to work in the opposite direction. The clearest evidence comes from a randomized trial involving pregnant women, a population at high risk for hemorrhoids due to the pressure of the growing uterus on pelvic veins. Women assigned to a structured exercise and lifestyle intervention had a dramatically lower hemorrhoid rate at hospital discharge compared to those receiving standard care. The protective effect was strong enough that the intervention was identified as the only independent protective factor in the analysis.

Why would movement help? Several things are at play. Regular exercise promotes healthy bowel motility, which means less time straining on the toilet, one of the most well-established hemorrhoid risk factors. Physical activity also improves venous return from the lower body, reducing the pooling of blood in pelvic veins. Walking, swimming, yoga, and similar activities keep things moving without generating the massive spikes in abdominal pressure that heavy lifting does.

A separate body of work looking at conservative hemorrhoid management has found that lifestyle approaches including improved defecation habits and pelvic-floor awareness can reduce prolapse symptoms and the need for surgery, even in patients with more advanced disease.

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Breathing Technique as Damage Control

For people who want to continue strength training despite hemorrhoid symptoms, breathing technique is probably the single most impactful modification. The research on Valsalva versus open-glottis exhalation during lifting shows that the pressure difference is enormous. Exhaling slowly through the concentric (lifting) phase of an exercise cuts the peak pressure roughly in half compared to holding your breath.

In practical terms, this means breathing out as you push or pull the weight rather than clamping down and holding air in your lungs. For a squat, you’d exhale on the way up. For a bench press, you’d exhale as you push the bar away. This feels less stable at first, and competitive powerlifters will point out that the Valsalva does provide more trunk rigidity at maximal loads. But for someone training for general fitness rather than a one-rep max, the trade-off clearly favors the open-glottis approach.

Other practical adjustments that reduce abdominal pressure during training include lowering the load and increasing reps, avoiding exercises that force you to hold your breath (heavy leg presses, for example, tend to be particularly bad), and standing up and walking between sets rather than sitting on a bench for extended rest periods.

Weightlifting Belts and Intra-Abdominal Pressure

Weightlifting belts are designed to increase intra-abdominal pressure on purpose. Research has confirmed they do exactly that: wearing a belt significantly raises peak intra-abdominal pressure during lifts, along with the rate at which that pressure builds.

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For spinal safety, that’s considered a benefit, since higher intra-abdominal pressure helps stabilize the lumbar spine and may reduce compressive forces on the discs. But for hemorrhoids, it’s a double-edged sword. The same pressure that protects your back is being transmitted to the pelvic floor and the vessels around the rectum. If you’re dealing with active hemorrhoid symptoms, wearing a belt during heavy compound lifts is likely amplifying the exact forces that aggravate your condition. You may need to choose between the spinal benefit and the pelvic cost, or simply lighten the load to where a belt isn’t necessary.

Cycling and Prolonged Saddle Pressure

The high hemorrhoid rate among cyclists and equestrians in the athlete survey points to a different mechanism than what’s happening with weightlifting. Here, the problem isn’t explosive increases in abdominal pressure. It’s sustained compression of the perineal area against a hard surface.

Research on professional mountain bikers has found they develop significantly higher anal sphincter pressures at rest and during squeezing compared to non-cycling controls. While higher sphincter pressure itself doesn’t directly cause hemorrhoids, it reflects the chronic mechanical stress the area is under, and it can contribute to impaired blood flow and tissue irritation in the anal canal.

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Casual cyclists who ride a few times a week for short distances are probably at much lower risk than professionals logging serious hours. But if you ride frequently and notice hemorrhoid flare-ups correlating with your cycling volume, a few adjustments are worth trying. A wider, anatomically shaped saddle that relieves pressure on the central perineal area can help. Standing periodically during long rides takes the sustained load off the tissue. Padded cycling shorts add a buffer. And keeping rides to a reasonable duration, especially during a flare, can prevent a minor irritation from becoming a bigger problem.

Dehydration During Exercise

There’s a less obvious pathway by which exercise can worsen hemorrhoids: dehydration. When you sweat heavily during a workout and don’t replace fluids adequately, your body conserves water by drawing more of it from the colon, which produces harder, drier stools. Hard stools require more straining to pass, and straining is one of the most direct aggravators of hemorrhoidal tissue.

Research on gastrointestinal responses to exercise has found that strenuous or prolonged exercise performed in a dehydrated state can produce gastrointestinal distress and tissue damage in the gut.

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This is an easy one to manage: drink enough water before, during, and after exercise. If you’re doing long endurance sessions, especially in heat, pay attention to fluid intake. It won’t cure hemorrhoids on its own, but avoiding exercise-induced dehydration removes one of the quieter contributors to the straining cycle.

Exercises That Are Generally Safe During a Flare

When hemorrhoids are actively bothering you, the goal is to stay active without making things worse. The following activities tend to be well tolerated because they don’t generate large spikes in abdominal pressure and don’t involve prolonged sitting on a hard surface:

Walking: Gentle on the pelvic floor, promotes bowel motility, and requires no equipment or modifications.
Swimming: The buoyancy of water takes pressure off the pelvic area entirely. The cool water can also be soothing during a flare.
Yoga and stretching: Most poses are fine, though deep squatting postures and inversions that increase pelvic pressure should be approached carefully.
Elliptical or light rowing: Lower impact than running, and your body weight is supported in a way that doesn’t concentrate force on the perineum.

Running falls into a gray area. It doesn’t generate the intra-abdominal pressure spikes of heavy lifting, but the repeated impact and bouncing can irritate external hemorrhoids in some people. If running is comfortable for you, there’s no reason to stop. If it’s not, switching to the elliptical or walking until the flare settles is a reasonable move.

When Exercise Makes Things Worse and It’s Not the Exercise

Sometimes the culprit isn’t the workout itself but what surrounds it. Sitting on a hard gym bench between sets for extended periods mimics the same prolonged-sitting problem that makes desk work a risk factor. Using your phone on the toilet after a workout, a surprisingly common habit, extends the time spent straining or bearing down on the bowl. Diet choices around training sessions matter too: a high-protein, low-fiber diet that’s common among people focused on building muscle is a recipe for harder stools and more straining.

It’s also worth considering that not all rectal symptoms during exercise are hemorrhoids. Anal fissures, which are small tears in the lining of the anal canal, can produce similar burning and bleeding and can be aggravated by the same activities. If your symptoms don’t respond to typical hemorrhoid management after a few weeks, or if you notice changes in bowel habits, significant bleeding, or pain that seems out of proportion, getting examined by a doctor is the right call. Self-diagnosing hemorrhoids is one of the more common ways people miss other conditions that need different treatment.

How the Underlying Science Shapes Up

The evidence connecting hemorrhoids and specific forms of exercise is growing but still relatively thin. The strongest piece of research linking specific sports to hemorrhoid prevalence is based on athlete self-reporting, which means the data reflects what people believe they’re experiencing rather than what a clinical exam confirms.

What makes the picture more convincing is that the physiological mechanisms align well with the reported patterns. We know that the vascular cushions in the anal canal are sensitive to pressure changes and connective tissue degradation.

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We know heavy Valsalva lifting produces extreme abdominal pressure. We know cycling alters sphincter dynamics. And we know moderate activity and good bowel habits are protective. The individual pieces are well supported even if no single large trial has directly randomized athletes to different exercise programs and tracked hemorrhoid outcomes over years. Given that hemorrhoids affect roughly half of adults at some point, there’s a case for more rigorous research into how training recommendations should be adapted for this extremely common condition. Until that research arrives, the practical guidance is reasonably clear: keep exercising, choose your activities thoughtfully during flares, breathe through your lifts, and don’t let your training habits undo the benefits of staying active.

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