I've probably been on a treadmill five times in my whole life. Needless to say, I don't know anything about treadmills.
So, I have been setting my walking speed at 2.8 and running at 4.5. Apparently, (based on last night's google search) that's pretty darn slow. Today, I walked at 3.5 and set my running speed at 6, which is 10 minutes per mile. Whew! At about 10 minutes, I wanted to give up, but I pushed through and thankfully got my second wind.
I definitely see how much work I have to do between now and race day.
Today was my longest gym day: 30 minutes of core strength class, 60 minutes of muscle strengthening class, 30 minutes of treadmill work. As a treat, I took my time afterwards stretching in the sauna... and later soaking in a Eucalyptus bath soak for sore muscles back at home.