As I understand, anaerobic exercise causes both aerobic and anaerobic adaptations. I've also come to hear on several occasions that LISS has specific aerobic adaptation advantages over HIIT that creates a call for it, no matter how much HIIT you do. What are those advantages?? Or did we determine that HIIT really is the holy grail of conditioning? Don't let me asking for sources dissuade you from answering, but sources.