The charge on my wireless trackball ran down yesterday and I was in a rush and couldn’t find the end of the USB-C charging cord on my desk, so I switched to the Magic Trackpad and kept going.

I liked it for a while, but this morning, I began to feel moderate pains up and down my arms.

At first I ignored them but then I became conscious of what was going on and I said to myself, “This is a terrible idea!”

And I plugged in the trackball and kept going. And the pain is subsiding.

I feel like I dodged a debilitating injury that could go on for years. I’ve luckily avoided RSI problems to date despite how much time I spend on computers, my iPhone and iPad.