The Exercises That Feel Completely Different After Pregnancy
Plenty of mums return to exercise expecting to feel unfit. Fewer expect familiar moves to feel strange: a squat that wobbles, a plank that bulges in the middle, a gentle jog that ends in a dash for the loo. Pregnancy and birth change the way the body handles load, and those changes show up in very specific exercises long after the baby has arrived.
None of this means something has gone wrong. It means the deep support system around the trunk and pelvis has been stretched for months, and it needs rebuilding in a sensible order before the heavier, faster work comes back into the week.
Why Your Core Feels Like a Stranger
During pregnancy the abdominal muscles lengthen to make room, and for many women the two strips of the six-pack separate along the midline, a condition called diastasis recti. It usually improves over time, but in the meantime the trunk can feel weak, lower back pain is common, and the belly may dome when you sit up or strain.
Crunches and sit-ups are the classic culprits here. They push pressure outwards and downwards at exactly the places that are still recovering, which is why early postnatal programmes favour gentle deep abdominal work instead: breathing out, drawing the lower belly in towards the spine, holding for a few seconds and repeating.
Jumping, Running and the Moment of Truth
Impact is where many women first notice a difference. Skipping, star jumps and running all ask the pelvic floor to react in a fraction of a second, and if it has not yet regained its strength, a small leak is often the first sign that it is not quite ready.
Leaking with impact is common after birth, but common is not the same as something to accept forever. It is a signal that the support underneath needs more attention before the training load goes up, not a reason to give up on running altogether.
Rebuilding From the Inside Out
The pelvic floor is the obvious starting point, and most women can begin gentle squeezes within the first few days, provided the exercises do not increase pain. The difficulty is that the work happens out of sight, so it is hard to tell whether you are doing it well. Some women find a pelvic floor trainer for women helpful at this stage, because it turns an invisible contraction into feedback on a phone screen and makes a routine easier to stick with during the sleepless, unpredictable early months.
Before going back to high-impact exercise, there is a simple test worth knowing. Guidance from the Royal Women’s Hospital in Melbourne suggests you check before jumping by coughing or jumping with a full bladder; if there is no leakage, you are likely ready for more. The same advice recommends avoiding strenuous, high-impact work such as running, weights and sit-ups for the first 12 weeks, and lifting nothing heavier than your baby for the first six.
Squats and lunges change too. With looser joints and a trunk that is still rebuilding, the knees may drift inwards or the pelvis may tip, so it pays to slow the movement down, use a mirror and add load only once the form looks the way it did before pregnancy.
Planks and push-ups deserve the same patience. Both load the front of the body heavily, so a short version from the knees or with the hands on a raised surface is a sensible bridge back. Watch the midline as you hold the position; if a ridge or dome appears, ease the load and build up gradually rather than pushing through it. The goal is control first and duration second, with the full version returning once the trunk can hold steady without strain.
A Rough Timeline, Not a Deadline
Boston Medical Center’s postnatal guidance offers a sensible progression to measure yourself against. It suggests short walks of around ten minutes in the first two weeks, light moves such as bridges, squats and lunges from weeks three and four, low-impact cardio like a recumbent bike from about week five, and power walking, dancing or light weights from six weeks. It also advises women to hold off on running for at least three months, longer for some, and to leave pushchair running until the baby is six to nine months old.
Those markers are averages rather than targets. A caesarean birth, a difficult tear or a complicated delivery can all stretch the timeline, and it is worth asking your GP, midwife or health visitor before stepping things up. Feeding is rarely a barrier, though; the same guidance notes that exercise does not reduce breast milk supply, provided you drink enough water.
Sleep deprivation is another variable that rarely gets mentioned. Broken nights make every session feel harder, slow recovery between workouts and can make coordination a little clumsier than usual. On the worst days, a walk with the pram or ten minutes of floor exercises still counts, and keeping the habit alive matters more than any single session.
What a Wobbly Squat Is Telling You
The exercises that feel most different after pregnancy are usually the ones that demand the most from the core and pelvic floor: anything with impact, anything that loads the front of the body, and anything that needs the trunk to stay stiff while the limbs move. Treat that wobble or that leak as information rather than failure, and work backwards to the foundations.
Breathing is part of those foundations too. Holding the breath while lifting a car seat or a toddler drives pressure straight down onto the pelvic floor, so try breathing out on the effort and gently drawing up as you lift.
Most changes settle with patience and steady, progressive exercise. Some need more help. If your baby is over three months old and you are still leaking, if you feel heaviness or a sensation that something is falling out, if sex is painful, or if pain is getting worse rather than better, speak to your GP or ask for a referral to a women’s health physiotherapist.
Recovery after birth is not a race back to the old routine. It is a chance to rebuild the base properly, so that the jumps, runs and heavy lifts you return to feel secure for years rather than weeks.
*This is a collaborative post
