When establishing training zones, is it more accurate to use lactate threshold (LT) as the primary anchor point, or would using critical power (CP) as the benchmark provide a more nuanced understanding of an athletes physiological responses to exercise stress? Specifically, how do the respective limitations of each method impact the development of effective training plans, and are there scenarios in which one approach is more suitable than the other? For instance, does the use of LT-based zones overlook the potential for variations in anaerobic capacity, and conversely, do CP-based zones adequately account for the impact of fatigue on an athletes ability to sustain efforts at or near maximal intensity? Furthermore, how do these different approaches influence the interpretation of data from power meters and heart rate monitors, and what are the implications for coaching and self-coached athletes seeking to optimize their training protocols?