I had to google that.

I'm so inefficient right now that there is no jog slow enough for me to stay under a 180 - age target. It would be like 5 seconds of jog and then power walking.

I expect my floor to improve considerably regardless of strategy. And I have tried a slow and steady approach once before (was shocked to learn I could almost run for indefinitely long periods of time by just going impossibly slowly).

Will keep this in mind when my efficiency picks up a bit. 

 Solid plan. Nothing beats the plan that you can stick to consistently.