Just wondering when, if you have the option, it becomes sensible to choose to run indoors on the treadmill.
Since I hit a wall in week 6 I've been doing two gym sessions a week with one and now aiming for two outdoor runs. The gym sessions are more general but designed with running in mind. I don't mind going out in the cold and wet (something pleasantly anti-establishment about going out in the rain in running gear with no coat).
Given the time of year when is it actually sensible to do the running sessions in the gym? Only when it's unsafe underfoot?