Recently I told a friend that I was training for a marathon.

The first thing he said was, “Great! Do you have a target in mind?”

I didn’t, but I did estimate it would take 5-6 hours given my current pace of the run-and-walk training I was doing.

“You should aim for 5 hours,” he said, “Otherwise there’s no point doing it. Oh, and make sure you don’t walk.”

I didn’t think too much about the conversation after that because I hadn’t thought that far, but I began to wonder if maybe I wasn’t training hard enough.

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