Peeing during exercise: why it happens and how to train for it

Why you leak when you jump, run or lift

Every landing, stride and heavy rep sends a spike of pressure down through your belly onto your bladder. To stay dry, your pelvic floor has to react fast enough and hard enough to keep the urethra closed at that exact moment. When the pressure spike is bigger than the closing force — or the muscles switch on a fraction too late — a little urine escapes. That’s exercise-induced stress incontinence.

It’s especially common in high-impact sports. A 2018 review of female athletes found leaking across many sports, with trampolinists reporting it most. A 2022 meta-analysis of 13 studies found that 44.5% of women doing CrossFit reported urinary leakage, mostly the stress type — the kind triggered by effort. So if your gym says “everyone leaks on double unders”, they’re not wrong about how common it is. But it’s a signal about load, not something you have to accept.

Not just a “mom problem”

Pregnancy and birth are big risk factors, but plenty of women who’ve never been pregnant leak during sport. Things that add to the load on the pelvic floor include:

• High, repeated impact: double unders, box jumps, burpees, trampolines, long runs.
• Heavy lifting with breath-holding: a hard brace on a max deadlift or squat pushes pressure down.
• Fatigue: many women leak only late in a workout or at mile 10, when the muscles are tired.
• Constipation and straining, chronic cough, or high-impact training since childhood.
• A pelvic floor that’s too tight, not just too weak. A muscle that’s already clenched can’t squeeze any harder when you land. If you also have pelvic pain, pain with sex or trouble starting to pee, check with the tight or weak quiz first.

The knack: squeeze before the effort

“The knack” is a well-timed pelvic floor squeeze just before and during the moment of pressure. In a small 1998 study of women with mild-to-moderate stress leaking, learning the knack for one week cut the urine lost during a medium cough by an average of 98% and during a deep cough by 73%. Timing mattered more than raw strength.

For sport, practice it in the same way:

1. Lift: squeeze and lift the pelvic floor as you start to breathe out, then begin the rep — stand up from the squat, pull the deadlift, press overhead.
2. Jump: squeeze a split second before take-off, and keep a light hold through the landing. Start with single jumps before you string them together.
3. Run: you can’t clench for a whole run. Instead, build endurance and reflexes (below) so the muscles work automatically, and use the knack for hills, sprints and stops.

Breathing and pressure management

Leaking during lifts often comes from pressure being pushed down instead of being shared around your trunk.

• Exhale on effort. Breathe in as you lower, and breathe out as you lift (“blow before you go”). This lets your pelvic floor rise with your breath.
• Match your brace to the load. A full breath-hold brace may be needed for a true max, but most working sets don’t need it. Try a lighter brace with a slow exhale and see if the leaking stops.
• Watch your ribs and belly. Rib flare and a belly pushed hard forward often mean pressure is being driven down. Aim for a 360° brace — sides and back expand too.
• Don’t hold your pee “just in case” and don’t empty your bladder “just in case” every 20 minutes. Go before training, then as needed.

A progressive training plan

NICE recommends pelvic floor training for at least 3 months as the first step for stress leaking, with programs of at least 8 contractions, 3 times a day. For athletes, the trick is to make that training sport-specific.

Weeks	Pelvic floor work (daily)	In your training
1–2	Slow holds lying and seated: squeeze, hold up to 10 seconds, fully relax. Plus quick squeezes. Check your technique.	Reduce the movement that makes you leak: fewer reps, lower box, single-unders instead of doubles. Practice exhale-on-effort.
3–4	Same holds in standing. Add the knack before coughs, lifts and single jumps.	Reintroduce the trigger movement in small sets you can do dry. Stop the set at the first leak.
5–8	Holds while moving: squats, lunges, step-ups. Quick squeezes in rhythm with small hops.	Build sets and volume by about one step at a time. Heavy lifts with a lighter brace plus exhale.
9–12+	Maintain 3–4 times a week. Add fatigue: do your sets at the end of a workout too.	Back toward full training. If you still leak, get assessed.

Before you start, use the pelvic floor strength self-test for a baseline, and repeat it every few weeks. The kegel timer paces holds and quick squeezes.

Gear and devices to know about

These don’t replace training, but they can help you keep moving while you build control. Discuss them with a gynecologist, urogynecologist or pelvic health physical therapist:

• Continence pessaries: a soft ring or cube-shaped device fitted by a clinician that supports the urethra. Some women wear one just for workouts.
• Disposable vaginal inserts sold over the counter in some countries, designed to support the urethra during activity. Ask a clinician whether one suits you.
• Period-style leak-proof underwear or pads: handy for peace of mind, but they hide the symptom rather than change it.
• Biofeedback: sensors or ultrasound used by a therapist so you can see the squeeze — useful if you can’t tell whether you’re doing it right.

If leaking stays bothersome despite training, a urogynecologist can talk you through the other options, including procedures. See our stress incontinence guide for an overview.

When to see a professional

See a pelvic health physical therapist or your doctor if you leak on most workouts after a few months of training, if you’ve recently had a baby (see pelvic floor after birth), or if you notice any of the red flags below. Heaviness, dragging or a bulge after running can point to pelvic organ prolapse, which needs a proper check before you keep loading it.

Frequently asked questions

Is it normal to pee when jumping on a trampoline or doing double unders?

It's common — reviews of female athletes find leaking in many high-impact sports, with trampolinists among the most affected, and a 2022 meta-analysis found it in 44.5% of women doing CrossFit. Common isn't the same as normal, though. It's a sign your pelvic floor isn't keeping up with the load, and that can be trained.

Why do I leak when running if I've never had a baby?

Birth is only one risk factor. Repeated impact, heavy lifting, breath-holding, constipation, and a pelvic floor that's weak, slow to react, or held too tight can all play a part. Stress leaking is well documented in young athletes who have never been pregnant.

Should I stop running or CrossFit?

Usually not. Most women do better by adjusting the load — fewer reps of the movement that makes you leak, or a lower box — while training the pelvic floor and pressure control. Stop and get checked if you feel heaviness, a bulge or pain.

Do kegels help with leaking during exercise?

Pelvic floor training is the first thing NICE recommends for stress leaking. For sport it works best when you train the muscles in the positions you actually use — standing, landing, lifting — and practice timing the squeeze just before the effort.

Can a pessary or insert stop leaking during workouts?

Some women use a continence pessary or a disposable vaginal insert that supports the urethra during exercise. They're options to discuss with a gynecologist or pelvic health physical therapist, who can check the size and fit and whether one suits you.

Sources

1. Prevalence of urinary incontinence in female CrossFit athletes: a systematic review with meta-analysis — International Urogynecology Journal, 2022
2. Prevalence of urinary incontinence in female athletes: a systematic review with meta-analysis — International Urogynecology Journal (Teixeira et al.), 2018
3. A pelvic muscle precontraction can reduce cough-related urine loss in selected women with mild SUI — Journal of the American Geriatrics Society (Miller et al.), 1998
4. Urinary incontinence and pelvic organ prolapse in women: management (NG123) — NICE

This page is general education about exercise, not a diagnosis or treatment plan. Talk to a clinician about symptoms that are new, severe or getting worse.