Your pelvic floor is a layered group of muscles and connective tissue that stretches across the bottom of your pelvis, sitting between your pubic bone in front and your tailbone in back. Think of it as a muscular hammock slung between your hip bones, forming the base of your torso. It sits deep inside your body, behind and above the area you’d contact if you sat on a bicycle seat.
The Bony Landmarks That Frame It
The pelvic floor fills a roughly diamond-shaped space inside your pelvis. The front point of that diamond is your pubic symphysis, the firm spot you can feel at the very bottom of your abdomen. The back point is your coccyx (tailbone). The two side points are your sit bones, the bony bumps you feel when you sit on a hard chair. Every pelvic floor muscle either attaches to or stretches between these four landmarks.
This diamond is often divided into two triangles. The front triangle, between the pubic bone and the sit bones, is the urogenital area where the urethra passes through (and the vagina, in women). The back triangle, between the sit bones and the tailbone, surrounds the anal canal. Together, these two triangles form the floor that closes off the bottom of your pelvic cavity.
What the Pelvic Floor Is Made Of
The pelvic floor isn’t a single sheet of muscle. It has multiple layers that work together, combining active muscle with tough connective tissue called fascia. The deepest and most important layer is a muscle group called the levator ani, which has three parts that each handle a different job.
The first part wraps like a sling around the lower rectum, working with your anal sphincters to control bowel movements. The second part supports the urethra and helps control urine flow. The third part connects to the tailbone region and acts as a stable anchor point, giving the whole structure its foundation. Sitting on top of these deep muscles are thinner, more superficial muscles that help with sexual function and provide additional sphincter control.
Woven through and around these muscles is a network of connective tissue (the endopelvic fascia) that links muscles to bones and organs. The muscles and fascia depend on each other. When the muscles are strong, they keep tension off the connective tissue. If the muscles weaken or lose their nerve supply, the fascia has to bear the full load of supporting your organs on its own, and over time it can stretch and fail.
What Sits on Top of It
When you’re standing upright, the pelvic floor is essentially horizontal, and your pelvic organs rest on it like items on a shelf. In women, the pelvic floor supports the bladder, urethra, uterus, vagina, and rectum. In men, it supports the bladder, urethra, prostate, and rectum. The urethra, rectum, and (in women) vagina all pass through small openings in the pelvic floor on their way out of the body.
This is what makes the pelvic floor unusual compared to other muscle groups. It has to be strong enough to hold organs in place and maintain continence, yet flexible enough to allow urination, bowel movements, childbirth, and sexual function. That dual role of support and release is why problems here tend to show up as either leakage or difficulty emptying.
How It Moves With Your Breathing
Your pelvic floor doesn’t just sit there passively. It moves in sync with your breathing diaphragm, the dome-shaped muscle under your ribs. When you inhale, the diaphragm drops downward to pull air into your lungs, and the pelvic floor relaxes and descends slightly to make room. When you exhale, the pelvic floor lifts back up as it contracts along with your abdominal muscles, helping push the diaphragm upward.
During a cough or sneeze, this coordination happens rapidly: the diaphragm, abdominal wall, and pelvic floor all contract together to manage the sudden spike in pressure inside your abdomen. The pelvic floor’s upward contraction compresses the urethra shut against the supportive tissue behind it, which is how your body prevents urine leakage during those high-pressure moments. Research measuring diaphragm movement found that when the pelvic floor contracts, it reduces the diaphragm’s range of motion by nearly half a centimeter, showing just how interconnected these two structures are.
Differences Between Male and Female Anatomy
The basic muscle layout is nearly identical in men and women. Both sexes have the same levator ani group, the same obturator muscles along the side walls, and the same superficial perineal muscles. The differences come down to size, thickness, and what passes through.
Men generally have thicker pelvic floor muscles overall, with one notable exception: the sling-shaped muscle around the rectum (the puborectalis) tends to be thicker in women, likely an evolutionary adaptation related to childbirth. Women also have a wider lower pelvic canal and a larger opening in the pelvic floor to accommodate the vagina, which is one reason pelvic floor disorders are more common in women. The shape of that opening changes with age, too. In younger women it tends to be more V-shaped, gradually widening into a U-shape over time.
About 25% of women experience some form of pelvic floor disorder, with urinary incontinence being the most common. Within 10 years of giving birth, roughly half of women report at least one pelvic floor issue.
How to Feel Where It Is
Because the pelvic floor is internal, you can’t see or touch it from the outside the way you’d feel a bicep. But you can sense it contracting. The simplest method is to squeeze the muscles you would use to stop passing gas or to cut off your urine stream midflow. When you do this correctly, you should feel a subtle lifting and tightening sensation deep in the area between your genitals and your anus. Women may notice a slight pulling feeling inside the vagina; men may feel the base of the penis draw inward slightly.
If you’re unsure whether you’re engaging the right muscles, a common check is to place a clean finger inside the vagina and squeeze as if holding in urine. A feeling of tightness around your finger confirms you’ve found the pelvic floor. The key sensation to look for is an inward lift, not a bearing-down push. If your buttocks, thighs, or abdominal muscles are visibly tensing, you’re recruiting the wrong muscle group.
The Nerve That Controls It All
Sensation and voluntary control of the pelvic floor come primarily from the pudendal nerve, which originates from the lower spinal cord (roughly at the level of your lower back and sacrum). This nerve branches into three paths: one that serves the anal area and external anal sphincter, one that serves the urogenital region and external urethral sphincter, and one that carries sensation from the genitals. It is responsible for both the ability to consciously squeeze your pelvic floor and the sensory feedback that tells your brain when your bladder or rectum is full.
Damage to this nerve, whether from childbirth, prolonged cycling, surgery, or other causes, can lead to muscle weakening over time. When the muscles atrophy from nerve damage, the connective tissue is left to support the pelvic organs alone, which can gradually stretch under the constant load and lead to prolapse or incontinence. This is why pelvic floor strengthening exercises are most effective when the nerve supply is still intact and the muscles can respond to training.