16 days agoI keep hearing this. Zone 2. Zone 2. Zone 2. I have been running almost exclusively in zone 2 for the past 6 months. 30 mile weeks in zone 2. What nobody says is how long it actually takes to build your aerobic capacity. How long does it take to see a noticeable increase in your speed after training zone 2? I’m averaging around 5 mph with my heart rate around 127-133. When will I see 6mph with the same heart rate?
