The Guardian

What does stress really do to our bodies – and when does it become a big problem?

Joel Snape — Sun, 17 May 2026 04:00:28 GMT

From an elevated heart rate to weakened immunity, experts explain the hidden physical costs of chronic stress – and why our bodies aren’t built to stay on high alert

You wake up later than planned, so it’s a rush to get everything sorted out ahead of the school run. While you’re waiting for the toaster, idiotically, you check your phone. Something has happened, and your timeline is a scalding-hot mess of the worst takes imaginable. One of your children has left their shoes somewhere unfathomable, and there’s an envelope on your doormat scolding you for driving in a bus lane.

You’re undeniably stressed, and your body’s likely to respond by ramping up the same biological systems that evolved to deal with inter-tribe disputes and mammoth attacks. But is there a downside to being stressed – and having these systems switched on – all the time? Take a calming breath, and let’s dig into the science.

The Guardian

What does stress really do to our bodies – and when does it become a big problem?

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