I've started reading into this a little and I'm curious how to apply it to my current training regime.
I do a fair few commuting miles on my bike (in the region of 120 a week) should this be all done in the aerobic zones to keep my body fresh for running? Also should the majority of my runs be aerobic with only the top 15% being in anaerobic zones? Or does this produce lots of junk miles?

Also does anyone have a half marathon training plan with zones on it?

I wait with a steady heart beat for answers.