Your body prioritizes preserving muscle tissue. If it lacks carbs for energy, it might break down muscle for fuel, hindering muscle building and recovery.
Low blood sugar can lead to dizziness, lightheadedness, and nausea, especially during prolonged exercise.
Without proper fuel, your body might struggle to repair and rebuild muscle tissue after exercise, hindering progress.
Without food for fuel, you might feel sluggish, experience low blood sugar (hypoglycemia), and struggle to maintain intensity during your workout.
In theory, with less readily available glucose (sugar) from food, your body might tap into stored fat for energy sooner during exercise.