I psyched myself up: "It's no big deal. If you can run 1 minute, you can do 2." Yea... not so much.
At 01:45, much huffing and puffing commenced, and the 1 minute of walking was about 30 seconds too short for me to fully catch my breath, or to convince myself I wouldn't fall out during the next 2 minutes of running.
Yet, I tried again. I did have to go back to 1 minute of running with 2 minutes of walking for 2 repetitions (I was dying). So, I ran for a total of 18 minutes and walked a total of 12. It should have been 20 and 10.
I hope tomorrow is easier.