In most countries, nobody has to be qualified to call themselves a postnatal trainer.
Here is what the credentials actually mean, who is regulated and who is not, and the five questions worth asking before anyone coaches your core.
Quick answer
Postnatal fitness credentials fall into three broad tiers. Physiotherapists and physical therapists are the only regulated clinicians in this list, registered with bodies such as the HCPC in the UK or AHPRA in Australia, and a pelvic health specialist among them can internally assess your pelvic floor. Personal trainers holding an additional pre and postnatal certificate have studied postpartum-specific programming, but personal training itself is not government-regulated in most countries, so the quality of that certificate varies enormously. A general personal trainer with no postnatal training is not qualified to program around diastasis recti or pelvic floor symptoms, even if they are excellent at everything else. The fastest way to find out which one you are dealing with is to ask five specific questions, listed below.
of women still had diastasis recti at 12 months postpartum (Sperstad et al., 2016)
is when the NHS postnatal check typically happens, and it is not a clearance to do anything
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Why the credentials are so confusing
Two things are true at once. Postnatal fitness is one of the most specialised areas of exercise there is, because you are working with a body that has just been through nine months of load and a birth. And in most countries, there is no legal barrier to advertising yourself as a postnatal fitness coach. Those two facts sitting next to each other are why mums end up guessing.
This is not a hit piece on trainers. Plenty of them are outstanding and have invested serious time in postnatal education. The problem is that the letters after someone's name do not tell you which kind you have found, and the marketing usually will not either. So you have to ask.
The three tiers, in plain English
Tier one: the regulated clinician. A physiotherapist (UK, Australia, Ireland, New Zealand, Canada) or physical therapist (USA) has completed a university degree and is registered with a statutory body: the HCPC in the UK, AHPRA in Australia, and state licensing boards in the USA. Within that group, a pelvic health or women's health specialist has further training and can perform an internal pelvic floor assessment. If you have leaking, heaviness, pressure, pain or a gap that is not changing, this is the tier you want. Our guide to what actually happens at a pelvic floor physio appointment takes the mystery out of booking one.
Tier two: the certified pre and postnatal trainer. A qualified personal trainer who has added a specific pre and postnatal qualification. A good one understands intra-abdominal pressure, breath mechanics, load management and diastasis progressions, and knows exactly when to refer you on. The catch is that these certificates range from multi-module courses with assessment to a weekend workshop, and the badge on the website looks the same either way.
Tier three: the general fitness professional. A certified personal trainer, group fitness instructor or class coach with no postnatal-specific training. They may be brilliant with a barbell and completely unfamiliar with what a postpartum abdominal wall tolerates. This is not a character judgement, it is a scope-of-practice one.
What each tier can and cannot do
| Who | What it means | Best used for | Not their job |
|---|---|---|---|
| Pelvic health physio / PT | Regulated clinician, degree-level, registered with a statutory body | Assessment, diagnosis, symptoms, internal pelvic floor examination, referral | Not usually long-term strength programming |
| Pre and postnatal certified trainer | Personal trainer with an added postnatal qualification | Progressive programming, form coaching, return to strength and impact | Cannot diagnose or examine internally |
| General personal trainer | Certified in general fitness only | General strength and conditioning once you are symptom-free and cleared | Should not be programming around a diastasis or pelvic floor symptoms |
| Group class instructor | Qualified to lead a format, postnatal training varies | Community, consistency, general movement | Cannot give you individual assessment in a room of twenty |
| A written program or guide | Structured progressions you follow yourself | Affordable structure, self-paced rebuilding | Cannot see you, cannot correct you, cannot assess you |
If you want that last row unpacked properly, we compared the trade-offs in detail in guide versus trainer versus physio.
Step 1: Ask which postnatal qualification they hold, by name
Not "are you postnatal trained?" but "which pre and postnatal qualification do you hold, and who issued it?" A specialist will name it without hesitating. Vagueness here, or a pivot to "I have worked with loads of mums", is your answer. Experience is genuinely valuable, but it is not the same as training, and a confident coach will happily tell you which one they are leaning on.
Step 2: Check whether it is postnatal-specific, not a general certificate
A level 3 or level 4 personal training certificate is a general fitness qualification. Pre and postnatal work is a separate add-on. Ask directly whether the qualification they named is specifically about pregnancy and postpartum, and roughly how long it took. A course with assessed modules is a different thing from an afternoon webinar, and most trainers will tell you honestly if you ask kindly.
Step 3: Ask how they screen for diastasis recti and pelvic floor symptoms
This is the single most revealing question. A well-trained coach will describe an actual process: a conversation about your birth and symptoms, a check of your midline, watching how your abdomen behaves under load. They will also tell you what would make them refer you to a physio rather than train you. If nobody has ever asked you about leaking, heaviness or your birth before putting you through a class, that is worth noticing. If you want to know what a basic check looks like, our at-home self-test walkthrough covers it.
Step 4: Ask how they would modify a session for you specifically
A good answer is concrete: which movements they would swap, how they would cue your breathing, what they would watch for during the set. Coning or doming along the midline should come up unprompted. So should the reasoning behind avoiding certain movements early on, which we cover in why crunches can make things worse and in our broader piece on which postpartum workouts help and which set you back. If the answer is "we just go at your pace", press for detail. Pace is not a modification.
Step 5: Watch one session before you commit to a block
Ask to observe or trial a single class before buying an eight-week package. Watch whether the coach actually corrects people, whether there is a genuine warm-up, and whether anyone is straining and holding their breath through repetitions. Five minutes of watching tells you more than any website. This matters most for in-person group programs, which we look at closely in our comparison of FIT4MOM Body Back versus a self-guided at-home plan.
A note on timing
None of this replaces knowing where you are in your own recovery. The postnatal check at around six to eight weeks is a health review, not a green light to load your core hard. If you are still working out when to begin at all, start with our week-by-week guide to returning to exercise after birth and take the slow route. Results vary from mum to mum, and rushing this stage is the most common reason mums end up starting over.
The short version
If you have symptoms, see a pelvic health physiotherapist first. That is the regulated tier and it is the one that can actually assess you. If you are symptom-free and want coaching, a trainer with a named pre and postnatal qualification who screens you properly is a strong choice. If you are working alone at home, a structured progression written for postpartum bodies is safer than improvising from social media, as long as you stop and get assessed when something does not feel right.
If you are rebuilding at home in the meantime
The Complete Postpartum Body Reset bundle gathers Mumma Glow's guides on deep core, diastasis progressions, pelvic floor, glutes and energy into one $50 one-time purchase. No subscription, no renewal date. Use code GLOW20 for 20% off.
Frequently asked questions
Is a personal trainer allowed to treat diastasis recti?
Treating is the wrong word. A trainer cannot diagnose or treat a medical condition. A trainer with pre and postnatal qualifications can program exercise appropriately around a diastasis, which is a different and legitimate thing. Assessment and diagnosis belong to a physiotherapist, physical therapist or doctor.
Do I need a referral to see a pelvic floor physio?
It depends on where you live and how your healthcare system works. In many countries you can self-refer to a private physiotherapist without a doctor's letter, while public pathways often require a referral from your GP, midwife or OB. Check with your local service, and mention your specific symptoms when you book so you get the right specialist.
Are online postnatal certifications any good?
Some are excellent and some are thin. Delivery format matters far less than whether the course was assessed, how long it took and how much of it covered pelvic floor and pressure management rather than just exercise selection. Ask the trainer those questions rather than judging by whether it was online.
What if my trainer has none of this but I like them?
You do not have to leave. You can ask them to work alongside a physio, keep the sessions to areas outside your core and pelvic floor for now, and follow a postpartum-specific progression separately for that part. Plenty of mums do exactly this.
How do I check that a physiotherapist is registered?
Registers are public. In the UK you can search the HCPC register, and in Australia the AHPRA register. In the USA, licensing is handled at state level, and each state board publishes a lookup. It takes about a minute and it is worth doing.
Sources: Sperstad JB, Tennfjord MK, Hilde G, Ellström-Engh M, Bø K. Diastasis recti abdominis during pregnancy and 12 months after childbirth. British Journal of Sports Medicine, 2016. NHS, postnatal check and postnatal care guidance. American College of Obstetricians and Gynecologists (ACOG), guidance on physical activity after pregnancy. Health and Care Professions Council (HCPC), UK physiotherapist register. Australian Health Practitioner Regulation Agency (AHPRA), practitioner register.
This article is general education, not medical advice, and Mumma Glow is not affiliated with any certifying body, professional register or fitness organisation named here. Results vary from mum to mum. If you have pain, leaking, heaviness or pressure, or a gap that is not changing, please see your GP, midwife or a women's health physiotherapist.