Why Athletes Fail Structured Workouts and How Closed-Loop AI Enforces True Training Polarization In structured endurance sports training, no execution failure is more pervasive, costly, or insidious than the inability to keep easy sessions easy and hard sessions hard. Sports science has repeatedly validated the superiority of polarised and pyramidal training models—where approximately 80% of total volume is executed strictly below the first ventilatory threshold (VT₁/ Aerobic

From Retrospective Screen-Gazing to Closed-Loop Cybernetic Interventions In the arena of endurance sports, the industry remains structurally obsessed with static physical metrics: Functional Threshold Power (FTP), VO₂max, lactate turn-points, and metabolic efficiency. Yet, as demonstrated across our previous analyses of human-computer interaction (HCI) and cybernetic control in sports, the ultimate limiting factor in sustained human effort is rarely a mechanical or cardiovasc