Set-up: two similar workdays. Yesterday took a quarter of a pill of Klonopin, today did 30 minutes walking at 4.0-4.2 MPH, HR=148. Exercise performed better.

In more detail:

Yesterday started with anxiety at work, at about 6. Took Klonopin. Anxiety came down to 2-3. Was able to do repetitive tasks. Was not able to start on a project that requires some minimal creativity.

Today started with anxiety at 8, following a tough conversation with my ex. Completely exhausted the list of repetitive tasks that I can do while anxious, and could not start on the project, was frozen, had nothing to do, went to the gym. After 15 minutes of exercise, the anxiety dissipated altogether. After the exercise, the anxiety returned at 1. I was able to start on the project and even problem-solved in an area which is not my forte.

Of course, this is my small single datapoint, but I invite you to repeat the experiment and share the results.