Training zones explained

As requested, here is a quick explanation of my training zones:

I-1 - 45-60% of max VO2, 60-72% of max HR, 0.8-1.5 lactate levels

I-2 - 65-80% of max VO2, 72-82% of max HR, 1.5-2.5 lactate levels

I-3 - 80-87% of max VO2, 82-87% of max HR, 2.5-4.0 lactate levels

I-4 - 87-94% of max VO2, 87-92% of max HR, 4.o-6.0 lactate levels

I-5 - 94-100% of max VO2, 94-100% of max HR, 6.0-10.0 lactate levels