You're showing up. You're doing the work. You're eating well, moving consistently, and still — your back hurts more after leg day than before it. Your belly isn't changing despite the core work. You feel unstable in ways that don't match your fitness level. You keep getting injured at the same spots.
Before you add more volume, hire a different trainer, or conclude that your body just doesn't respond the way it should, there's one thing worth checking that most fitness and healthcare providers never think to look for.
Diastasis recti.
The Fitness Industry Doesn't Talk About This
The fitness industry is very good at progressive overload, nutrition periodization, recovery optimization, and mobility work. It is not particularly good at identifying when the foundational structure of the core has a gap in it that makes conventional training actively counterproductive.
Diastasis recti — the separation of the rectus abdominis muscle columns along the midline — is a structural condition that affects a significant portion of the population. Postpartum women are screened for it occasionally, men rarely, and non-postpartum women seldom. Which means a significant number of people showing up to the gym, doing the programming, and wondering why their results don't match their effort are training around — and often worsening — an unidentified structural problem.
How DR Makes Fitness Harder and More Painful
Your core can't generate the support your spine needs
The abdominal wall functions as a pressure management system for the lumbar spine. When it's structurally intact, core engagement during training stabilizes the spine and pelvis correctly. When the midline is separated, that system is compromised — pressure that should support the spine leaks through the gap instead, leaving the lumbar muscles to compensate. This is why back pain consistently follows training for many people with unidentified DR: the training is loading a spine that doesn't have adequate core support underneath it.
Traditional ab work makes it worse
This is the cruelest irony for anyone trying to address core weakness through conventional training. Crunches, sit-ups, most leg raises, many Pilates exercises, loaded dead bugs, and any movement that creates forward-doming pressure at the midline actively widens a diastasis. The more diligently you do your ab work, the worse the separation gets — and the more frustrating the cycle becomes. You're working hard and going backward.
Your belly won't flatten regardless of body composition
The visible forward protrusion that many people attribute to body fat and train exhaustively to address is often the forward herniation of abdominal contents through a weakened midline wall. It is not fat. No caloric deficit, no amount of cardio, and no ab training will resolve a structural separation. Only addressing the connective tissue itself changes this — which is why some people achieve genuinely impressive body composition results and still have a belly that doesn't match.
Pelvic floor dysfunction limits what you can do
DR and pelvic floor weakness are closely connected — the abdominal wall and the pelvic floor are part of the same pressure system. When the abdominal wall is compromised, the pelvic floor often bears the load instead. The result is leakage with jumping and impact training, pelvic pressure with heavy lifting, and the uncomfortable reality of having to modify or avoid exercise categories that would otherwise be appropriate and beneficial.
Injury patterns repeat
Without adequate core support, movement under load consistently places compensatory strain on the same structures — typically the lower back, the SI joints, the hip flexors, and the knees. If you have a recurring injury pattern that appears at the same locations despite addressing them directly, the shared driver is often the compromised core stability underlying all of them.
What "Diastasis Safe" Training Actually Means
Diastasis safe training is not gentle training. It is not low-intensity or low-load. It means training in ways that manage intra-abdominal pressure correctly — generating core engagement that supports the spine without creating forward force through the midline.
During the initial phase of DR rehabilitation using the Tupler Technique® program, the recommendation is to temporarily avoid exercise classes, weight training, and sporting activities while building transverse muscle strength — focusing instead on aerobic activities like walking, the elliptical, and the upright stationary bike. Once diastasis size is reduced and connective tissue is strengthened, a diastasis-safe exercise routine is reintroduced progressively.
This is not a permanent restriction. It is a sequenced rehabilitation process. Many people who commit to the Tupler Technique® program find they come out the other side training harder and more effectively than they were before — because their core is actually functioning the way it's supposed to.
How to Know if DR Is Part of Your Picture
Ask yourself:
- Does your belly dome, cone, or ridge when you do abdominal effort?
- Does your back consistently hurt after training despite doing "all the right things?"
- Does your belly not respond to diet and exercise the way the rest of your body does?
- Do you feel unstable or unsupported through your midsection under load?
- Do you have leakage or pelvic pressure with impact or heavy training?
Any of these warrants checking. The Diastasis Rehab self-check guide walks you through how to assess for separation at home: diastasisrehab.com/pages/check-belly. Use code 5DRFREEMAN to receive a discount on program and materials purchases.
Two Paths Forward
The Tupler Technique® — a research and evidence-based program developed by Julie Tupler, RN — is the most well-established approach for closing a diastasis non-surgically and returning to full training. The 18-week program addresses the connective tissue directly rather than working around it. As a Tupler Technique® affiliate, I recommend this program as the foundation for anyone whose fitness goals are being limited by DR. Learn more and find the right program at diastasisrehab.com. Use code 5DRFREEMAN to receive a discount on program and materials purchases.
Alongside the program, chiropractic care at Breathe addresses the structural consequences that have accumulated — the back pain, the postural compensation patterns, the nervous system load — so your body is healing from multiple directions simultaneously rather than trying to rehabilitate the core while everything downstream from it stays symptomatic.
Your Body Is Not the Problem
If you've been showing up and not getting the results that effort should produce, the problem is almost certainly not your commitment, your metabolism, or your body's ability to change. It may be a structural gap in your foundation that nobody has ever thought to look for.
Let's find out.
Work with Dr. Carla at Breathe Chiropractic in Phoenix:Book Your First Visit HERE
Explore the Tupler Technique® adult program:
diastasisrehab.com/pages/adults-with-a-diastasis-recti
Use code 5DRFREEMAN to receive a discount on program and materials purchases.
Dr. Carla Freeman, DC is a Tupler Technique® affiliate at Breathe Chiropractic in Phoenix, AZ.
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