Your Body Knows You're Burning Out Before You Do

Dr. Lindsay McGraw is a Doctor of Physical Therapy, a board-certified clinical specialist, and a certified ergonomist. She is the founder of Marka Health, where she builds injury prevention programs for distributed and hybrid workforces.

By the time someone tells me they're burned out, I've usually been able to see it for months. Not in how they talk about work: I see it in their jaw.

I'm a physical therapist and a certified ergonomist. I spend my days with my hands on people who work at desks, a lot of them executives.

I can't diagnose burnout, because it isn't actually a medical diagnosis. The World Health Organization files it as an occupational phenomenon, which is a formal way of saying, “We can't run a blood test for this.” If there’s no test, the earliest data on you is physical, and it's there long before anyone calls it burnout.

We treat burnout as a psychological event with a psychological fix: Rest more, set boundaries, go to therapy. All of those things are worth doing, but they start after you’ve already named the problem, based on subjective data about your feelings.

Body tissue is different. It gets measured from the outside, in degrees and pounds. And the simplest version of this test needs no equipment: You have two hands, and only one has been on a mouse all day.

Here are four signals that show up in your tissue, in the order I notice them. Each takes about 10 seconds to check.

How Burnout Shows Up in the Body

Your Jaw

Sustained stress shows up as clenching, during the day and often overnight. It's involuntary, so you usually don't notice until your jaw hurts or your dentist finds the wear.

Check it: Are your teeth touching right now, reading this? They shouldn't be. Also: Do you have soreness when you wake up or headaches at your temples?

Your Neck and Upper Shoulders

The problem isn't a heavy load, it's a light load that never lets up. Your smallest motor units, the ones that fire at low effort, switch on first and switch off last, so under hours of low-effort holding they never get a break. Researchers call this the Cinderella hypothesis, because they're first to the ball and last to leave it.

When I point this out to my clients, they tell me what to blame: the chair, getting older, “I have terrible posture,” or “I know I should stretch more.” “Bad posture” isn’t a personal failing. Your body is always trying to conserve energy, and slumping is cheaper than not slumping. That’s why willpower alone won’t work.

Check it: Breathe out, then consciously let your shoulders drop. If they moved, they were Cinderella-ing.

Your Grip on the Mouse

Grip force climbs with mental effort, and nobody decides to squeeze. In one study, adding mental pressure to a mouse-aiming task pushed grip force up 51%. The hand and mouse didn’t change, but the problem got harder.

Check it: Make a fist with both hands and compare. Which one already felt halfway there?

Your Breath

Slump, and your ribs lose the room to expand, so the breath goes high and short into your chest, and you recruit the scalenes and sternocleidomastoid to help. Those are emergency muscles, meant for when you're being chased, not for a Tuesday. They’re also neck muscles, so by evening they're as sore as if they'd spent the day turning your head. That's the neck pain, and no new chair fixes it.

Check it: One hand on your chest, one on your belly, then take a normal breath. Which moves first? Ideally, neither does. Aim to widen your whole rib cage — front, back, and sides — like you're making your bra band bigger.

Why High-Performing Women Miss the Signals

Women at the executive level are exceptionally good at overriding these signals. They power through, stay steady, and don't make it anyone else’s problem. It's a professional adaptation that has worked for a long time. It just isn't sustainable for your body.

Plus, there is always “one more thing,” after this launch, after the reorg, after things calm down. The job is clearing the plate, so the plate itself never makes it onto the list. Spoiler: Things rarely calm down.

The skill isn’t the problem. The problem is there is no off-switch, and nobody built you a dashboard for the thing it's overriding.

How to Build Your Own Early Warning System

Run the exam, not the posture audit. Everyone tells you to sit up straight, but nobody hands you a measurement. Run the mouse squeeze and the breath test today, then again in a month, and a month after that. You’ll get a trend line instead of a mood.

Give the tissue an off-signal. What predicts neck pain over time isn’t any single hard day, it's cumulative load. A 2024 analysis pooling data from more than 700 workers found that work breaks are best spread across the day rather than saved up. Can you end your meetings five minutes early? It’s a fix you can pull unilaterally, on Monday, for everyone who reports to you.

Ask who owns it. In one meeting this week, ask who at your company owns whether or not people are physically comfortable where they work. HR? Workplace? Facilities? Benefits? Then, watch the room. In my experience, the answer is often nobody, and that vacuum is cheap to fill once you notice it.

The most impactful change I recommend costs nothing and takes five seconds. Get your hips all the way to the back of your chair, then scoot your chair in. Now the chair is holding you up instead of you holding you up, and your hands aren’t reaching. The chair was never the problem. You just weren’t in it.

Your body reports early and accurately. By the time anyone calls it burnout, the file is already thick.