If you have ever felt like you are running on empty — exhausted in a way that sleep does not fix, braced even in calm moments, stretched beyond what you thought a person could carry — this research explains why. And why you deserve support.
In 2009, researchers at the University of Wisconsin-Madison published findings that stopped many people in their tracks. Mothers of autistic children, they found, showed stress hormone profiles comparable to combat soldiers. Not occasionally. Chronically. As a daily physiological reality.
The research team, led by Marsha Mailick Seltzer, followed a group of mothers of adolescent and adult autistic children over eight consecutive days. Each day, mothers were interviewed about their experiences — how they spent their time, their fatigue levels, the stressful events that occurred, and how much time they had for themselves.
On four of those eight days, researchers measured the mothers' cortisol levels. Cortisol is the hormone the body produces in response to stress. In healthy individuals under normal pressure, cortisol rises in the morning and gradually falls across the day — a natural rhythm that allows the body to recover.
The mothers in the study showed significantly flattened cortisol curves — a pattern where the hormone stays abnormally low throughout the day. This is not what happens under short-term acute stress. It is what happens under chronic, sustained, unrelenting stress — the kind that has gone on so long that the body's stress response system has essentially worn down.
This same cortisol profile had previously been documented in combat soldiers, Holocaust survivors, and people with PTSD.
"This is the physiological residue of daily stress."
What makes this research significant is not the stress itself — most autism parents already know they are stressed. What matters is that the stress has become biological. It is no longer just emotional or psychological. It is written into the body's hormone system.
This has real consequences. Chronically depressed cortisol is associated with fatigue that does not resolve with rest, difficulty concentrating, lowered immune function, increased susceptibility to illness, and emotional dysregulation. In other words: the symptoms most autism parents describe as their daily experience are not personal weakness. They are the physiological consequences of sustained, largely unacknowledged caregiving under extreme pressure.
The companion study found that compared to mothers of non-disabled children, these mothers experienced more stressful events each day, had significantly less time for themselves, and were more likely to have their work and leisure interrupted by caregiving demands.
A parent whose nervous system is in chronic stress is not simply a tired parent. They are a parent whose capacity to regulate, connect, respond with patience, and model calm has been significantly compromised — not because of who they are, but because of what they are carrying, usually alone, usually without enough support.
And autistic children co-regulate through the nervous systems of the adults they trust most. Which means the state of the parent is not separate from the wellbeing of the child. They are directly connected.
This is why supporting the parent is not a luxury or an afterthought. It is the intervention.
If you have reached this page, you may recognise yourself in this research. The exhaustion that goes bone-deep. The hypervigilance that means you cannot fully relax even when your child is calm. The guilt that arrives when you consider your own needs. The isolation of an experience most people around you do not fully understand.
None of that is character. None of it is weakness. It is the documented, measurable, physiological consequence of doing something extraordinarily hard, for a long time, with insufficient support.
The question is not why you are struggling. The question is what support would actually make a difference.
Our courses are built for exactly where you are right now. Not for who you should be — for who you actually are, carrying what you are actually carrying.