Integrating Applied Positive Psychology and Cognitive Prospection into Metabolic Self Regulation Beyond Glycemic Control

Abstract Conventional models of chronic illness self-regulation adhere to pathogenic, risk-avoidant paradigms that emphasize symptom prevention and rigid biomarker thresholds (e.g., HbA1c < 7.0%). Although indispensable for preventing microvascular and macrovascular pathology, this deficit-centered focus paradoxically depletes self-regulatory bandwidth, culminating in decision fatigue and diabetes-related distress. This paper proposes an applied psychometabolic paradigm that synthesizes Martin Seligman’s PERMA framework, Barbara Fredrickson’s Broaden-and-Build theory, and cognitive prospection—the mental generation and affective pre-experiencing of prospective states. We posit that postprandial glycemic volatility acts as an acute neuroenergetic disruptor, impairing prefrontal executive resources essential for emotional equilibrium, forward-oriented planning, and sustained work performance. To empirically ground this paradigm, a 7-day single-subject (N=1) dietary crossover investigation was performed under naturalistic conditions. Continuous glucose monitoring (CGM) interstitial traces were integrated with real-time ecological momentary assessments evaluating executive focus, affective stability, and physical stamina across three dietary regimens: (1) Unsequenced High-Glycemic Intake, (2) Targeted Intra-Meal Nutrient Sequencing, and (3) Microbiome-Directed Whole Foods with Active Ferments. Marked glycemic spikes during Phase 1 (peaking at 207 mg/dL) consistently elicited acute neurocognitive sluggishness, attention fragmentation, and severe collapses in self-rated executive focus (reaching nadirs of 1/10). Conversely, intra-meal nutrient sequencing (Phase 2) attenuated peak postprandial excursion to 124 mg/dL without restricting caloric density, while fiber-rich fermented nutrition (Phase 3) established post-meal recovery at 93.7 mg/dL alongside ceiling-level ratings of executive flow and positive affect (10/10). These observations indicate that somatic metabolic stability constitutes an essential physiological foundation for executive stamina and agentic prospection. Reconceptualizing dietary behavior from a burden of clinical compliance to a proximal driver of mental vitality provides a viable framework for applied positive psychology in health settings.