How Intermittent Training Improves Aerobic Performance

High intensity intervals are billed as for the more recreational weekend warrior type athlete. They're good because they're short and if your time crunch you don't need that much time but also improve both aerobic and anaerobic capacity to a certain extent. What's actually driving or part of what's driving aerobic adaptation during this type of training is not the actual intervals themselves, it's so completely anaerobic especially for like short four minute sets.