A few people have asked abou the terms I use. I can't figure out a way to do an FAQ so every now and then I'll try to post a mini-FAQ.
ORN: Obligatory Running Note: This term originated on one of the first internet-based, email list called "The Dead Runners Society". It was - at the time - a "secret" group to which you had to be invited. The members were mostly academics and government types [this was in the mid 1990's before the internet was so universal]
The members tended to go "off topic" on things like sports or politics so they instituted an "ORN" rule. You HAD to put an "obligatory running note" in every post.
The "numbers": 5/1, 4/2, 3/2, etc: These represent the run/walk ratio that I used that day. The first number is the running time in minutes. The second number is the walking time, in minutes. So a 60 minute run, at 5/1 would be running 5 minutes, walking 1 minute, and then repeating that until I got to 60 minutes.