Two years into my diagnosis, fatigue remains my most persistent symptom. Unlike the more dramatic presentations — a myositis flare, a chest infection that turns out to be an ILD exacerbation — fatigue is constant and, in many ways, sneaky. It doesn't announce itself until I've already overdone it.
This post is about what I've learned. It is entirely personal. What works for me may not work for you, and nothing here constitutes medical advice.
The energy envelope concept
The biggest conceptual shift for me was understanding what occupational therapists call the energy envelope. The idea is that each of us has a daily energy budget — and for people with chronic illness, that budget is smaller and more variable than it used to be.
The instinct, especially on a good day, is to spend every last unit. You feel better, so you do more. Then you pay for it over the following two or three days. Physiotherapists call this the boom-and-bust cycle, and it's exhausting in a way that compounds itself.
"Rest before you're tired, not after."
This sounds simple. It runs completely counter to every instinct I had before diagnosis. It took months of tracking — using a simple journal, not an app — to actually believe the data over my optimism.
What I track
I keep a daily log with three things:
- Energy level on waking (1–10)
- Activity load (rough estimate of physical and cognitive effort)
- How I felt the following morning
After three months, the pattern was undeniable: days where I pushed above roughly 70% of my perceived capacity were followed by significantly worse energy the next day. Days where I stayed at 60–70% were followed by stable or slightly improved energy.
The 70% figure is mine. Yours will be different.
Sleep
ILD-related nocturnal hypoxia disrupted my sleep badly before my oxygen requirements were properly assessed and managed. If you're waking frequently, feeling unrefreshed, or have morning headaches, please raise this with your respiratory team. It's not just "tiredness from the condition" — it may be something addressable.
Outside of that, standard sleep hygiene has helped me significantly:
- Consistent wake time regardless of how poorly I slept
- No screens for 45 minutes before bed
- Keeping the bedroom cool and dark
- Short (20-minute) naps before 2pm if needed — longer naps or later naps fragment night sleep
Cognitive fatigue
Something I wasn't prepared for was the cognitive dimension. On difficult days, concentrating, finding words, and making decisions all take noticeably more effort. I've heard others in the community describe this as "brain fog."
What helps:
- Doing cognitively demanding tasks (emails, appointments, anything requiring decisions) in the morning
- Writing things down rather than trying to hold them in working memory
- Accepting that some tasks will take longer than they used to, and building that into planning
The emotional dimension
Fatigue isn't just physical. Grieving the level of activity you had before diagnosis is real and valid. I found it helpful to work with a clinical psychologist who had experience with chronic illness — not because anything was "wrong" emotionally, but because adjusting to a new baseline is genuinely difficult and benefits from support.
A note on exercise
Counter-intuitively, gentle exercise helps with fatigue in ASyS — particularly for those with inflammatory myopathy. The key word is gentle, and supervised where possible. Pulmonary rehabilitation has evidence behind it for ILD patients. Before starting or changing any exercise programme, discuss it with your rheumatologist or physiotherapist.
Everyone's experience of ASyS is different. I hope something here is useful to someone. I'm not a medical professional — I'm a patient sharing what I've found helpful. If you have questions about your own management, please speak to your care team.