The Importance of Zone Two Training

I tend to think low intensity if people read like Coggin's book or even, I think Freels book it lines up right around whatever is zone two. Like your breathing isn't ragged and you're definitely not like feeling like you're going to blow up at all. And Freels from cyclist training Bible with heart rate, he's looking at 85 to 89% of threshold heart rate. So there's a lot of training plans that actually assign zone two for months.