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 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 Y ou 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