Leisure Sickness: Why High Performers Get Sick on Vacation

Leisure sickness describes symptoms that show up on weekends and vacations rather than during the work week, and it’s often a sign that chronic stress and burnout have been building beneath the surface. When you’ve been running on adrenaline for weeks or months, your body stays in high-alert mode just to keep up. The moment you finally slow down, that protective push fades, and the toll of all that sustained stress catches up with you. It can look different from person to person. For some, it’s a pounding headache that arrives the moment they stop checking email. Others feel a heavy, bone-deep fatigue that sleep doesn’t seem to fix, or muscle aches and stiffness they hadn’t noticed while they were busy pushing through. Some develop nausea, a sore throat, or even flu-like symptoms just as their time off begins. Because these symptoms appear as soon as the pressure lifts, weekend episodes often strike on Saturday, the day after the last workday, while vacation episodes tend to hit in the first few days away. For many people, this isn’t a one-time event. It often begins during an especially demanding stretch of life and turns into a frustrating pattern that can last for years. The good news is that the symptoms themselves are usually short-lived. Headaches, fatigue, and muscle aches often ease within a few days as your body settles into rest. Leisure sickness isn’t a formal medical diagnosis but if this describes you, you’re far from alone. A recent survey from IU International University of Applied Sciences suggests that feeling sick or drained on days off is a common experience among working adults.

If you lead a team, run a company, or carry high-stakes responsibility, this part may sound familiar. The people most prone to leisure sickness tend to have heavy workloads, a strong sense of responsibility, perfectionist tendencies, and real trouble relaxing. Many feel guilty when they aren’t working and can’t get work out of their heads, even on vacation.

Interestingly, it isn’t about how they spend their time off. Their weekends and vacations are just as healthy and enjoyable as anyone else’s. The problem isn’t the vacation. It’s the way they operate in the weeks before it. It’s the same profile that makes someone effective under pressure: you push through, stay on, and handle what others can’t. But those strengths become a liability when your body only gets permission to slow down once a year.

If this sounds like you: the pattern can be changed without lowering your standards. Schedule your personal 1:1 consultation to get clarity on what's driving it and what the right next step looks like.

The most widely cited explanation is the let-down effect, and it centers on your stress hormones. When you're under pressure, your body releases cortisol and adrenaline. In the short term, these hormones help. They sharpen your focus, dampen pain and keep inflammation in check, which is why you can power through a deadline-heavy week without so much as a sniffle. The theory goes like this: when the pressure finally lifts, cortisol levels drop and that protective cover fades. Symptoms that were simmering in the background, or a virus you picked up days earlier, suddenly come through. The same pattern can show up after a board presentation, a product launch, a closing or any intense stretch of work. Experts aren't fully settled on this. Some suggest we don't get sick more often on vacation at all; we simply notice symptoms once we slow down and there's finally room to feel them.

Vertical axis: conceptual relative stress-hormone activity (0–100), not actual blood concentrations. Horizontal axis: days on vacation. Blue Line: Cortisol (Illustrative) - Green Line: Adrenalin (Illustrative)

Short bursts of stress are one thing. Chronic stress is another, and it’s where burnout enters the picture. The World Health Organization describes burnout as an occupational phenomenon that results from chronic workplace stress that hasn’t been successfully managed. It is characterized by exhaustion, mental distance or cynicism about your job, and reduced professional effectiveness. It isn’t classified as a medical condition, but it can quietly wear down your health. That wear and tear helps explain why so many people get sick on vacation. When stress hormones stay elevated for weeks or months, immune cells can become less responsive to them. The body becomes slower to respond to early threats and takes longer to recover. At the same time, stress tends to mask what’s happening. Elevated cortisol raises your pain threshold, so you push through headaches, sniffles, and sore muscles without really noticing them. Burnout also erodes the everyday habits your immune system depends on. Sleep gets shorter, meals get skipped, and movement falls off the calendar. So by the time you finally leave for vacation, you’re often running on empty. With nothing left in reserve, your body is poorly equipped for the changes in sleep, climate, and routine that travel brings, and that’s often when illness catches up with you.

Getting sick once on a trip doesn’t automatically mean you’re burned out. But when it happens at the start of almost every break, it’s worth looking at the bigger picture. Do you feel exhausted even after resting? Do you struggle to switch off, or feel a twinge of guilt whenever you’re not working? Maybe you catch colds often, feel run down for much of the year, or your sleep is regularly disrupted. Some people even start dreading the return to work before their vacation has begun. If several of these feel familiar, your body may be asking for more than a week away. This isn’t a diagnosis, but it is a signal worth listening to. Talking with your doctor or a mental health professional can help you understand what’s going on and find a more sustainable way forward.

Getting sick on vacation is rarely just bad luck. It's usually a mix of accumulated stress, a sudden drop in tension and the demands of travel itself. Treating vacation as the only time you rest asks too much of a single week. The more you build recovery into your everyday routine, the more likely it is that your time off will feel like time off.

Sources • Vingerhoets et al. (2002), Leisure Sickness: A pilot study on its prevalence, phenomenology, and background, Volltext (Tilburg University) • PubMed • IU International University: Leisure Sickness, Pressemitteilung 24.06.2025 • IU International University: Studienseite Leisure Sickness • WHO: Burn-out an "occupational phenomenon" • sabinebright.com