When You’re Doing Everything Right… But Your Uniform Still Gets Tighter

There’s a particular kind of frustration that comes with starting to fly.

You try to be sensible with food. You don’t live on junk, you don’t go wild on layovers, and on your days off you genuinely try to reset -cooking proper meals, moving your body when you can, doing what most people would call “the right things.”
And then a few months in, you start noticing little things. Your uniform doesn’t zip as easily as it used to. You step on the scale and think, huh… when did that happen? Nothing extreme, just enough to feel slightly out of sync in your own body.
And the most confusing part is that nothing obvious explains it.

I remember my own first six months of flying very clearly. I gained seven kilos. Me, a “healthy girl”.
Not from partying. Not from ignoring my health. Not from suddenly living on crew meals. And at the same time, my cycle, which had always been consistent, suddenly felt like it had been thrown into chaos. It would have been easy to blame myself, but deep down I knew the bigger change wasn’t my discipline - it was my environment.

I had moved to a new country, into a completely different climate, into a lifestyle where sleep, meals, and stress levels no longer followed any predictable rhythm.
My body wasn’t failing me.
It was adapting. And sometimes, adaptation looks like holding on to energy rather than letting it go.

The body isn’t always sure when it’s supposed to be awake, resting, eating, or recovering, so it sometimes holds on to energy just to be safe

Why this can happen even when you’re doing things right?

When we enter aviation, we often underestimate how much the body depends on rhythm.
Our system runs on an internal clock that expects some consistency in light, sleep, activity, and food timing. Flying disrupts all of that. One week you’re waking in the middle of the night, another you’re trying to sleep through the afternoon, and ordering a room service that has very little nourishment to offer at 3 am.
When that body clock gets thrown off, the rest of the system can wobble a bit, too. Your metabolism doesn’t stop working, but it may become less predictable. The body isn’t always sure when it’s supposed to be awake, resting, eating, or recovering, so it sometimes holds on to energy just to be safe. And the frustrating part is that this can happen even when you’re eating reasonably well and trying to take care of yourself.

On top of that, flying places the body under a steady level of physiological stress. The environment itself, dehydration, cabin pressure, operational alertness, constant changes, irregular sleep - keep your system slightly more activated than usual. Over time, this can influence cortisol, the hormone that helps you respond to stress. When cortisol patterns get out of sync, appetite signals can change, energy storage can increase, and weight can move in a direction you didn’t expect.

Sleep disruption plays its role as well. Even small changes in sleep quality or timing can affect hunger hormones (ghrelin and leptin), making you feel hungrier, less satisfied after meals, and more tired overall. It’s not a lack of willpower; it’s about hormonal signals inside the body temporarily losing their usual rhythm.

For many women, reproductive hormones respond to this adjustment, too. Changes in sleep, stress, travel, and routine can influence the menstrual cycle, especially in the early phase of life when everything is still new. It can feel worrying, but often it’s simply the body trying to stabilise itself in unfamiliar conditions.

Finding your rhythm takes time, so be kind to yourself

What helped me wasn’t trying to control things more strictly, but slowly learning how to support my body within aviation instead of fighting against it.
Over time, I found small anchors that made a difference: repeating similar meal patterns when possible, building movement into my schedule in flexible ways rather than rigid routines, and creating simple sleep habits I could recreate in any hotel room. It wasn’t perfect, and it didn’t need to be. It was about giving my body enough familiar signals that it could settle.

And yes, sometimes that also means allowing space for the beauty of the job.

Aviation lets you meet the world through food in a way few other professions do. A local dish on a memorable layover, a bakery you may never visit again, a meal shared with crew somewhere far from home - those experiences are part of why this job is special.

In aviation, food shouldn’t be about restriction. It’s about nourishment. Because flying already places enough demand on your system.

If this is happening to you, don’t assume you’ve done something wrong

Very often, your body is simply recalibrating. It may be adjusting hormones, managing sleep debt, adapting metabolism, or learning how to function within an irregular rhythm. These are real physiological processes, not personal failures.
And once you understand your individual response, things usually start to make much more sense. Two crew on the same roster can experience completely different changes in weight, energy, sleep, or cycle patterns. That’s why, when things feel confusing or persistent, the answer is rarely stricter rules. Instead, it’s understanding what’s happening in your body.

Sometimes that means looking deeper - at blood work, hormonal markers, sleep patterns, nutrition timing, and stress load in order to understand what support your body actually needs in this environment.

This is exactly the work I now do through Aviation Health coaching. Together, we look at your real roster, your body’s signals, your health markers, and your lifestyle, and build something practical that works within aviation rather than expecting you to live like someone with a fixed daily routine.

You are not failing. You are adjusting.

Be kind to yourself.

Ivana