Fat Oxidation, Fasted Training, and Low-Carb, High-Fat Diets (Replay)

Fasted training and low-carb, high-fat diets are detrimental to endurance performance and long-term health, despite their popularity in the mountain sports community. Consistent aerobic training naturally enhances fat oxidation, rendering extreme dietary restrictions unnecessary and counterproductive. Prioritizing carbohydrate intake supports metabolic flexibility, allowing athletes to access quick energy for high-intensity efforts while maintaining hormonal health and bone density. Chronic energy deficits, even when occurring only within specific training windows, increase the risk of Relative Energy Deficiency in Sport (REDS), leading to injuries and impaired recovery. Elite performance trends confirm that high carbohydrate availability is essential for breaking records and sustaining training loads. Rather than seeking dietary hacks, athletes should focus on fueling consistently to meet energy demands, which facilitates better recovery, improved mood, and sustainable progress toward mountain objectives.