I just saw the scale. I've put on four pounds in the last two months. Ugh.

And it's all due to an unfounded assumption.

Here's what happened.

I injured my foot in early May.

That meant I had to stop running and stop my daily walks.

This made my sleep worse.

The tiredness made me even more sedentary.

Every time I tried to get back to my walking and running routines, I'd feel pain in my foot later on.

This went on for six weeks.

Finally, I went to the doctor and discovered that I had sprained the joint connecting my foot to my big toe.

Had I known this I would have gotten treatment sooner and recovered faster.

I could have avoided the fatigue and the weight gain.

What was my assumption?

It's just pain. Walk it off.

When life showed that my idea was incorrect, I ought to have seen the doctor, but instead, I waited six weeks to discover the truth.

The lesson: Test your assumptions. Then pivot quickly when you're wrong.