Sam Smith - 1:1 Coach on Instagram: "Labels are useful when they explain cause and effect. Aerobic vs anaerobic describes energy production mechanisms, but as a standalone framework it has limited explanatory power for understanding fatigue and repeatability. It does not clearly explain: * How long a given output can be maintained before fatigue accelerates * Why small increases in work rate produce disproportionate increases in fatigue * How task demands alter what can be repeated versus briefl