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As a result of a recent operation, I'm under orders from my doctor to keep my arm low, ie not to raise it above shoulder level.

It sounds like an easy request to remember - you're very aware of it when you do things like putting on a shirt - but there are other times when it slips your mind, such as for example when you feel like stretching your arms when you yawn!

So here's my solution to stop unwitting accidents...
 
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Step 1: What you'll need

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The device we're going to use is a driver nap alert which is designed to fit over the ear and buzz if you nod your head forwards too much.
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