Scientists have found that positive thoughts do have the power to calm heart rates and boost our immune system.
In a recent study published in the journal Clinical Psychological Science , researchers divided a group of 135 people into five groups, and played each a different set of audio instructions – some of which were kind, and some of which were critical.
The groups whose audio encouraged them to be kind to themselves experienced lower heart rates and lower sweat responses – signs of a feeling relaxed and safe.
"By switching off our threat response, we boost our immune systems and give ourselves the best chance of healing," lead researcher Dr Anke Karl told the Telegraph. "We hope future research can use our method to investigate this in people with mental health problems such as recurrent depression."
This study is a good reminder we should look at the way we treat ourselves, our own self-talk. Are we being our own cheerleaders, or filling our heads with criticism and self-doubt?
If you're unsure, ask yourself if you would speak to a friend the same way?
You may be surprised by the answer.