The types of people who've narrowed the gap are already well trained endurance athletes. If your long term average is 180 minutes a week of cardio, you're not

The types of people who've narrowed the gap are already well trained endurance athletes. If your long term average is 180 minutes a week of cardio, you're not an advanced endurance athlete. You're probably middle of the pack in the fun run. No offense, that's still admirable, but you can use your time much better than just doing only zone 2.