Professional Article

By: MARTA MOURA
Abdominal Rehabilitation Specialist, creator of the Marta Moura Fitness App, author of the book Mamãs Fit

Belly fat after 40 isn't a lack of willpower...

It’s biology, it’s hormones, it’s pressure. There is a scientific explanation, and the solution is simpler than you imagine.
There is a complaint I hear constantly from the women who follow me, and one that I myself have often felt too. "I do everything right. I eat well, I move, I take care of myself. And the belly is still there." If you see yourself in these words, I need to tell you something: it’s not weakness. It’s not a lack of discipline. It’s your body changing, and no one explained to you how to navigate that change.

WHAT CHANGES IN A WOMAN'S BODY AFTER 40
Starting at age 40, estrogen levels begin to fluctuate and eventually decrease.
This hormonal change has a very direct effect: fat no longer distributes itself preferentially in the hips and thighs and begins to accumulate in the belly area. It’s not your imagination. It is female physiology.
Added to this is a natural loss of muscle mass called sarcopenia, which begins to accelerate precisely at this stage. Less muscle means a slower metabolism, less tone, and a core area that "gives way" more easily.
And then there is a third factor, almost never mentioned: intra-abdominal pressure. With aging, the pelvic floor loses tension, posture changes, and the belly begins to protrude forward, not due to excess fat, but due to a lack of internal support. It’s as if the body's natural "corset" has stopped working fully.

THE MISTAKE WE ALMOST ALL MAKE

When the belly appears, the instinctive response is to do abdominal exercises. Many of them. The classic crunches, sit-ups, and static planks that everyone knows. The problem is that these exercises increase precisely the intra-abdominal pressure we mentioned. Instead of "tightening" the belly from the inside out, they push the organs down and forward. For women who already have some degree of abdominal muscle separation—the so-called abdominal diastasis, very common after pregnancies—these exercises can even aggravate the existing separation. The result? Work without results, the opposite of the desired result, and often frustration.

WHAT THE FEMALE BODY REALLY NEEDS
The answer lies in working the belly from the inside out. Not on the surface, but in the deepest layer—the transverse abdominis—which functions as a natural corset around the entire central region.
Deep activation exercises, such as diaphragmatic breathing with conscious contraction or postural apnea with axial elongation—techniques that are part of the hypopressive universe—teach the body to create internal support without increasing pressure on the pelvic floor. These are silent exercises, not very flashy, but extraordinarily effective.
The good news is that these exercises do not require equipment, can be done at home, and the first results in terms of posture, the feeling of a "waist," and less belly bloating appear in the first few weeks.

STRENGTH AND MUSCLE: THE OTHER HALF OF THE EQUATION

Parallel to deep activation work, strength training becomes essential after 40. Not to "get muscular"—unless that is your goal—but to combat sarcopenia, keep your metabolism active, and give your body the structure that hormones no longer guarantee on their own.

You don't need to go to a gym. You don't need to lift heavy weights. But you do need to challenge your muscles regularly, and that changes everything: the body, the energy, the posture, and the relationship you have with yourself.

ONE LAST THING
If you reached 40, 45, or 50 feeling like your body betrayed you, I want you to know that is not what happened. Your body is adapting. Your mission now is to understand the new rules of the game and train in your favor.
A belly that doesn't budge is not a failure. It is an invitation to get to know your body more deeply than you ever have before.