Can I go on a trampoline while pregnant?

The verdict

Almost certainly not, and it is worth being precise about where that answer comes from, because it does not come from a study or from a guideline that mentions trampolines.

Search the NHS, the RCOG, ACOG, Tommy's and the HSE in Ireland and you will not find the word trampoline in any pregnancy guidance. That absence is the honest starting point. What exists instead are two general rules that trampolining lands squarely inside, and every professional you ask will be applying those rules rather than quoting a finding.

The two rules being applied

The first is about impact. ACOG advises avoiding jerky, bouncy or high-impact motions that can increase your risk of being hurt, and gives the mechanism: the hormones made during pregnancy cause the ligaments that support your joints to become relaxed, which makes the joints more mobile and at risk of injury. Repeated landing on a sprung surface is the definition of bouncy high-impact motion.

The second is about falling. The NHS says exercises that have a risk of falling should only be done with caution because falls carry a risk of damage to your baby. Tommy's says any exercise or activity where there is a risk of falling can be risky, because your growing bump alters your centre of gravity, which can make it harder to keep your balance. The HSE in Ireland puts it as avoiding activities that could cause you to lose balance, fall or get hurt.

A trampoline is a surface designed to make you leave the ground and to make your landing unpredictable. Both rules engage at once.

The pelvic floor question

There is a third consideration that is rarely stated and is probably the one that matters most to people who trampoline regularly.

The NHS is explicit that the pelvic floor consists of layers of muscle that come under great strain in pregnancy and childbirth, that weak pelvic floor muscles mean you may leak urine when you cough, sneeze or strain, and that all pregnant women should do pelvic floor exercises even if they have no symptoms now. Repeated impact loading is precisely the kind of strain that provokes leaking in people whose pelvic floor is already working harder than it was.

Note what this is and is not. It is a musculoskeletal and continence argument about you. It is not a claim that bouncing dislodges or harms a baby, which nobody has demonstrated and which the anatomy does not obviously support.

Trampoline parks and bouncy castles

Commercial trampoline parks generally exclude pregnant visitors as a term of entry, and so do many inflatable attractions. That is an operator and insurer decision, not a clinical one, and you should read it as such rather than as evidence of a specific danger.

The practical consequence is the same either way: you are unlikely to be admitted, and arguing the evidence at a reception desk will not change a policy that exists to manage the operator's liability.

Garden trampolines with children

This is the version of the question that most people actually mean. You have a toddler, the trampoline is in the garden, and being pregnant does not stop the toddler wanting you on it.

The considerations that follow from the guidance are worth spelling out because they are not obvious. A trampoline with two people on it transfers energy between them, so an adult can be launched by a child's landing at a moment they did not choose. That removes the control that makes the fall-risk argument tolerable elsewhere. Sitting on the frame, or on the mat while a child bounces gently, is a different proposition again, though no guidance addresses it and pretending otherwise would be dishonest.

What the guidance does want you to do

The point of all this is not that pregnancy is a reason to stop moving. Quite the opposite. ACOG's Committee Opinion 804 states that physical activity and exercise in pregnancy are associated with minimal risks and benefit most women, and that women who habitually engaged in vigorous-intensity aerobic activity before pregnancy can continue. The HSE in Ireland says it is usually safe to continue regular highly vigorous activity as long as your pregnancy is uncomplicated.

If trampolining was your cardio, the exchange available to you is generous. The NHS recommends swimming because the water supports your increased weight, and points to aquanatal classes. ACOG recommends walking, water workouts, stationary cycling and modified yoga and Pilates. None of those carry the impact or the unpredictability, and all of them keep the benefit.

If you have already been on one

A bounce before you knew you were pregnant, or a short go on a garden trampoline, is not something any guidance treats as an event requiring action. Nobody has published a threshold and no test looks for retrospective harm from impact.

What does warrant contact is symptoms rather than the activity itself. The HSE in Ireland publishes a clear list: phone your GP, midwife or obstetrician immediately if you have shortness of breath before or during exercise, chest pain or palpitations, have been feeling faint or dizzy, have regular contractions, have severe pain in the abdomen, back or pubic areas, or notice reduced movement of your baby. Bleeding or fluid loss after any impact should be treated the same way.

The short version

No named body has published on trampolining in pregnancy. The advice against it is inference from two well-founded general rules, plus a continence argument that deserves more attention than it gets. That inference is reasonable, and knowing it is inference lets you make a sensible decision about sitting on a garden trampoline with a three-year-old rather than treating it as a medical emergency.