This is the article in question.

My rules are:

• If it’s raining, I can skip that day, but must make up the distance later.
• No banking ahead of time for rain.
• No banking or making up distance for any other reason. The run must be every day.
• Injury is a valid reason to skip a day, without making up later.

I invite anyone else who’s interested to join in their own identical or similar challenge.