How Kegels Actually Work: The Muscles Behind Erections, Stamina, and Control

You've heard kegel exercises can help with erections, help you last longer, and improve bladder control. But nobody explains how. What muscles are involved? What do they actually do? And why would exercising them change anything?

Here's the straightforward anatomy - no medical degree required.

The Two Muscles That Matter

Your pelvic floor is a hammock of muscle that stretches from your tailbone to your pubic bone. It supports your bladder, bowel, and - critically for men - the base of your penis.

Two muscles within this group do most of the work that matters for sexual function:

The bulbocavernosus (BC) muscle wraps around the base of the penis and the bulb of the urethra. When it contracts, it does three things: it compresses the base of the penis to help maintain erection rigidity, it creates the pumping action during ejaculation, and it pushes the last drops of urine out after urination.

The ischiocavernosus (IC) muscle runs along each side of the penile shaft. It compresses the penile crura (the internal root of the penis) against the pelvic bone, which traps blood inside the erection. Stronger IC muscles mean better blood retention - which translates directly to harder erections.

How This Connects to Erections

An erection is a hydraulic event. Blood flows in through arteries and gets trapped by compressed veins. The pelvic floor muscles - specifically the IC muscles - are what compress those veins.

Dorey and colleagues (2005, BJU International) studied 55 men with erectile dysfunction and found that pelvic floor exercises improved erection quality in 75.5% of men. 40% fully recovered. The mechanism is straightforward: stronger pelvic floor muscles compress the veins more effectively, trapping more blood, producing firmer erections.

This is the same mechanism that erectile dysfunction medications target - improved blood flow and retention - but through muscle function rather than chemistry.

How This Connects to Lasting Longer

The connection to ejaculatory control is less obvious but backed by equally strong evidence.

Most men with premature ejaculation don't have weak pelvic floors. A 2025 study (Lyu et al.) found no significant difference in pelvic floor muscle strength between men with PE and healthy controls. The issue is awareness and control - specifically, the ability to consciously relax the pelvic floor during arousal.

When the BC muscle contracts involuntarily during sex, it triggers the ejaculatory reflex. Training teaches you to notice that tension building and consciously release it - a reverse kegel. Pastore and colleagues (2014, Therapeutic Advances in Urology) found that this combination of contraction training and intentional relaxation improved ejaculatory control in 82.5% of the 40 men studied.

This is why effective training needs both standard kegels (building strength) and reverse kegels (building the ability to relax on command). Learn more about reverse kegels for lasting longer.

How This Connects to Bladder Control

The pelvic floor muscles also act as a valve around the urethra. When you cough, sneeze, or lift something heavy, the sudden increase in abdominal pressure pushes down on the bladder. Strong pelvic floor muscles clamp the urethra shut to prevent leakage.

Quick-twitch training - rapid contract-and-release pulses - is particularly effective for bladder control because the muscles need to fire fast enough to catch sudden pressure spikes. This is why kegel programs for incontinence emphasize fast flicks alongside longer holds.

For men recovering from prostate surgery, the connection is even more direct. Surgery can damage the urinary sphincter, and pelvic floor exercises help compensate by strengthening the muscles that support it. Read more about kegels after prostate surgery.

Why Most Advice Gets the Anatomy Wrong

Generic kegel instructions say "squeeze as if you're stopping the flow of urine." That's a reasonable starting point, but it's incomplete for men.

Ben Ami and colleagues (2022, International Journal of Environmental Research and Public Health) tested six different verbal cues using real-time ultrasound and found that "squeeze as if preventing gas" and "try to shorten your penis" activate the correct muscles in over 91% of men. Meanwhile, "draw in your belly button" - an instruction you'll find on dozens of health websites - only works 25% of the time.

The muscles that matter for erections and ejaculation are at the base and sides of the penis, not your abs or glutes. If you're tensing your stomach or clenching your buttocks, you're training the wrong muscles entirely.

For step-by-step guidance on finding and training the right muscles, read our complete kegel exercise guide for men.

Frequently Asked Questions