ORN: 50 min @ 5/1
For those of you who follow closely, you'll notice that I'm doing 50 minutes, but altering the run/walk ratio. This keeps me on my feet for the same amount of time, but, as I increase my run ratio the amount of time I RUN increases. Obvious, I know.
Changing the run/walk ratio is a great way to get different workouts in the same amount of time. An EASY 50 minute workout might be running 3 minutes and walking 2. You might do 4/2, or 4/1. You could even move all the way up to 9/1. It doesn't matter.
What matters is finding a way to vary your runs so that your body doesn't get "locked in". The shorter the run interval, the faster you can run. The longer, the slower.
This way you can keep your total workout time the same but still have LOTS of variety.