Question 3 at the very bottom:
3. Why not chart Pace-to-Exhaustion (PTE) as a series of intensities and graph them. The AnT is PTE(.5-1h). The AeT is PTE(3-4h). Right now ADS is defined as a >10% gap between AnT and AeT. Seeing the shape of individual PTE curves might shed light on previously unknown relationships.