Get off the screen and stretch your legs. 

That's the message from an expert in mental wellbeing after new research showing a marked increase in device-time during lockdown.  

Neuroscience educator Nathan Wallis told Kate Hawkesby exercise is crucial. 

"People go on about it, but it makes a huge difference to your mental health. Kick-start the hormones that are in your brain and you can get that from just 20 minutes exercise a day, actually you can get it from just walking to the mailbox and back." 

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