Fasted Cardio and the Fat-Burning Zone: Real Substrate Shift, No Extra Fat Loss

Summary

Training fasted **does** make you burn more fat *during* the session, and low-intensity work **does** burn a higher *percentage* of calories from fat — both real, both replicated — but **neither increases fat LOSS** once total daily calories are matched: the body compensates over 24 hours, and body fat is governed by sustained energy balance, not by the fuel mix burned inside one workout. ---