Yep, I always wear a mask. Finished the naked 7km run today. Final time was 28:34 on the chip (Garmin said 28:39 for 7.02km). That was exactly where I wanted to be, so I am satisfied. It was -10 out there, so it was a good effort, I think, especially because I'm not in great physical shape at the moment.
The groin felt fine while running, but was a bit tight after, so I think I will continue to take it easy for a little while longer. I have been doing easy runs every other day, and will keep doing that until I feel 100% I think.