endurance analytics 2025-09-11T06:22:30Z
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Rain lashed against the cabin window as I stared at trembling hands, the ghost of last year's DNF still clawing at my confidence. Fifty miles into the Bryce Canyon Ultra, my body had betrayed me with cramps that felt like shards of glass in my quads. Now, twelve months later, wilderness stretched beyond the glass - beautiful and terrifying. My salvation sat glowing on the iPad: TrainingPeaks' stress balance graph showing a jagged red line spiking into overreaching territory. That crimson warning