Nutritional experts discuss the effects of fasted training

Experts suggest that training in a fasted state may increase fat oxidation during low-intensity exercise, but it does not guarantee greater long-term weight loss. Nutritionist Juliana Andrade explains that while lower glycogen levels after sleep may cause the body to use fat as fuel, weight loss ultimately depends on total daily energy balance.

Physical educator José Adeirton notes that fasting can lead to lower insulin levels, which facilitates fat use as an energy source. However, he warns that for activities requiring high strength or resistance, fasting may cause a decrease in performance. He recommends focusing on consistency and potentially using low-carbohydrate pre-workout snacks, such as fruit, rather than total food deprivation.