Quick Answer
Leaking when you run, jump or lift is usually a form of stress incontinence, where a sudden increase in pressure inside your abdomen outpaces your pelvic floor’s ability to respond in time. It is common, particularly with high-impact movement, and it does not mean something is broken or that exercise is off the table for good. NICE guidance points to a supervised pelvic floor muscle training programme, usually tried for at least three months, as the first thing to work through. If the leaking is new, getting worse, or shaping how much you move, that is a reasonable prompt to get assessed by a GP or pelvic health physiotherapist rather than guessing at the cause.
A Familiar Moment
Something I hear often from women in classes: a small leak partway through a run, a jump rope set, or the second rep of a heavy lift, followed by an immediate assumption that they have somehow let their body down. There is usually a moment of stopping, checking, and deciding whether to carry on. It is worth saying plainly that this experience is common, and common is not the same as something you have to accept forever without looking at it.
Many women have already been told, informally, that this is just part of being active, or part of having had children, and that the fix is to do more crunches or simply avoid the activities that trigger it. Neither of those responses gets to what is actually happening.
What May Be Happening
Running, jumping and lifting all share one thing: a fast rise in pressure inside your abdomen, transmitted downward onto your pelvic floor and bladder neck. Your pelvic floor’s job in that moment is to respond quickly enough, and with enough coordinated tension, to keep the urethra closed against that pressure spike. NHS guidance notes that high-impact exercise and sit-ups put pressure on your pelvic floor muscles and can increase leaks, which is a useful, plain way of describing what a lot of women feel but do not always have language for.
It can help to think of the pelvic floor a little like a trampoline positioned under something landing on it. With enough spring and quick enough response, the trampoline absorbs the load and returns to position. If the timing is slightly off, or there is not quite enough tension in the material, some of that force escapes rather than being absorbed. This is a useful way to picture the timing and coordination involved, but symptoms alone cannot establish the cause or severity of a particular concern. A gap in timing, a strength issue, a tissue support issue and a coordination issue can all produce the same leak, and assessment is what actually tells those apart. In my experience teaching movement to women dealing with this, the timing piece is often the part nobody has named for them before, they have usually only ever been told to get stronger.
This pattern is sometimes described as stress incontinence, meaning leakage under physical stress or pressure on the bladder, distinct from a sudden urge to go that arrives with little warning. An overly tense pelvic floor, rather than a weak one, can also produce leaking under load, which is one of the reasons a generic strengthening plan does not always help and can occasionally make things feel worse.
A 2018 systematic review with meta-analysis in the International Urogynecology Journal (Teixeira et al.) found urinary incontinence in around 36 percent of female athletes across a range of sports, with a substantially higher likelihood in athletes than in sedentary women, drawn from eight studies of varying sports and methods. It is a helpful sense check that this is a widely shared experience among active women rather than a rare or unusual one, though it does not tell you what is happening in your own body specifically. The leak is information, not a verdict.
Working Out What to Try First
The first thing I would point you toward, and what the guidance backs up, is not stopping the activity altogether but building the pelvic floor’s capacity to respond to it. NICE guidance recommends a supervised pelvic floor muscle training programme, generally run for at least three months, with a pattern of short and longer contractions repeated several times a day, before other options are considered. This is deliberately supervised rather than self-directed, because technique, timing and tension all affect whether pelvic floor exercises actually help, and a programme that has not been checked against how your muscles are actually working can go on for months without shifting anything.
Lifting deserves a specific mention, since it works slightly differently to running or jumping. NHS guidance suggests tightening your pelvic floor muscles before and during a lift, rather than only afterwards, which is a small, practical adjustment worth trying whether the lift is a weight in the gym or a child being picked up off the floor.
Hypopressives are one movement approach some women explore as part of a wider plan for pressure management during activity. They do not replace assessment, supervised pelvic floor muscle training where that is recommended, or physiotherapist-guided treatment, and the research base here is still developing, so they should not be presented as a guaranteed fix for leaking during exercise.
Gentle movement that feels well tolerated is not automatically something to avoid altogether, but a generic plan cannot account for your individual symptoms, health history or recovery, which is exactly why an assessment is more useful than a one-size answer found online.
Questions Worth Taking to an Appointment
If you are booking in with a GP or pelvic health physiotherapist about this, it can help to go in with a few specifics rather than a general description of leaking during exercise. Worth tracking for a week or two beforehand:
- Which specific activities trigger it, and whether it is every time or only sometimes
- Roughly how much leaks, and whether it happens with a full or empty bladder
- Whether it happens with coughing or laughing too, not only exercise
- Any other symptoms, such as a feeling of heaviness or pressure
A short script that some women find useful at the appointment: “I leak when I run, jump or lift, most noticeably during [activity]. I have not had a pelvic floor assessment before and would like to understand what is actually happening before I keep adjusting my exercise around it.”
When to Seek Assessment
This guide is educational and cannot diagnose the cause of leaking during exercise. Arrange an assessment with a GP or pelvic health physiotherapist if the leaking is new, getting worse over time, happening with everyday activities beyond exercise, accompanied by a feeling of heaviness or bulge, or affecting how much you are willing to move. None of these on their own necessarily point to something serious, but they are all reasonable, ordinary reasons to get a proper assessment rather than continuing to guess.
If you want to understand pelvic floor leaking more broadly before or alongside that appointment, the Urinary Incontinence guide covers the wider picture, including patterns beyond exercise.
Sources
- NICE (NG123): Urinary incontinence and pelvic organ prolapse in women, management
- NHS: 10 ways to stop bladder leaks
- NHS: Urinary incontinence overview
- Teixeira et al. (2018): Prevalence of urinary incontinence in female athletes, a systematic review with meta-analysis, International Urogynecology Journal
