Belly Fat May Increase the Risk of Urinary Leakage in Women

Stress urinary incontinence (SUI) is a common condition in women that causes urine leakage during activities like coughing, sneezing, laughing or exercise. While it’s often linked to factors like childbirth or aging, a study published in the European Journal of Obstetrics & Gynecology and Reproductive Biology highlights another important contributor: body fat distribution.

SUI is “urinary leakage that occurs when pressure inside the abdomen increases and the pelvic floor can’t hold it in,” explained the study’s adviser, Patricia Driusso, a professor of physical therapy in women’s health at the Federal University of São Carlos in São Paulo, Brazil. “The problem is often underreported, but even a few episodes of urinary leakage indicate that the continence mechanism is not functioning properly.”

Investigators examined how different types and locations of body fat relate to SUI symptoms and how much those symptoms affect daily life. They looked at several types of fat, including total body fat, android fat (fat stored around the abdomen), gynoid fat (fat around the hips and thighs) and visceral adipose tissue, a deeper type of fat that surrounds internal organs.

The findings showed that women with SUI had higher levels of all types of fat compared to women without urinary symptoms. However, not all fat had the same impact. Fat stored around the abdomen, especially visceral fat, was most strongly linked to SUI.

“We had imagined that fat in the gynecological region, being closer to the pelvic floor, would have a greater influence, but what emerged was visceral fat,” said Driusso.

For example, increases in visceral fat were associated with a significant rise in the likelihood of experiencing SUI, with one analysis showing up to a 51% increase in risk. While increases in total, android and gynoid fat were also linked to higher odds of SUI, their effects were smaller in comparison.

Beyond risk, the study also looked at how fat distribution affects the severity and impact of symptoms. Women with higher levels of visceral fat reported more discomfort from urinary symptoms and a greater impact on their daily activities. This included challenges with physical movement, social situations and overall quality of life.

So why does fat, especially abdominal fat, matter? One explanation is that excess fat in the abdominal area can increase pressure on the bladder and pelvic floor, making it harder to control urine during physical stress. Over time, this added pressure may weaken the muscles that help prevent leakage.

Investigators noted several strengths of the study that make its findings more reliable. They used a highly accurate tool called dual-energy X-ray absorptiometry to measure body fat, allowing them to clearly see not just how much fat participants had, but where it was located. They also accounted for important factors like age and childbirth history, both of which can affect bladder control.

However, there are some limitations to keep in mind. The study only included women between the ages of 18 and 49, so the results may not apply to older women or other groups. Because this was a cross-sectional study, it can show a link between body fat and urinary symptoms — but it cannot prove that one causes the other.

Investigators believe future studies should include more participants and look at additional factors, such as overall body weight. They also suggest using more advanced imaging to better understand how fat within muscles may affect urinary symptoms.

While many factors contribute to SUI, managing body weight and particularly reducing abdominal fat may help lower risk and improve symptoms. These findings add to growing evidence that where fat is stored in the body (not just how much) can play a key role in health outcomes, including urinary function and quality of life.

“Urinary incontinence impacts quality of life, limits activities and is often overlooked. But it can be treated and prevented,” Driusso concluded. “The most important thing is for women to know that they don’t have to live with it.”