Thanks for taking the time to go deeper into this, appreciated.
If we assume an exceptional talent, combined with optimal training, recovery, nutrition and a perfectly optimized (and aggressive) chemical support program, it does seem that many classical “red flag” stress signals could be strongly muted. Lower acid load, better pH control, and improved oxygen delivery could, at least in theory, suppress the usual breathing panic and visible distress even at very high W/kg.
At the same time, sustained fat oxidation at those intensities is intrinsically oxygen expensive, so even with increased O₂ delivery per heartbeat, are physiological limits truly being removed, or just shifted to a different bottleneck?
And on heat management, if enhanced oxygen transport allows more blood flow to the skin without immediate power loss, is that a stable solution or a very narrow and fragile balance, especially late in long stages, on irregular terrain rather than controlled conditions?
I keep wondering whether even an extremely optimized human system would truly hide all downstream signs of strain. Metabolic, central, and neuromuscular fatigue don’t always break down in sync and biology has a habit of leaking through subtle cues as small cadence irregularities, uneven torque, or micro adjustments in posture when conditions stop being perfectly steady.