Who wrote this no Arthur or Scientific Studys shown. Just a bunch of bro science. Fasted cardio is fine if your doing Low Intensity Steady State Cardio. If your using l-carnitine to transport fat and other fat burners they will be more effective on empty stomach. Ya if your doing HIIT cardio on empty stomach it needs quick energy which will pull aminos instead fat which take longer to get.
The prevailing formula for a long time on how much fat you’re going to burn was calories in minus calories out, based on your basal metabolic rate (BMR) and exercise efforts, explains strength and performance specialist Joel Seedman, Ph.D., owner of Advanced Human Performance in Atlanta. But with all the different biochemical reactions in the body, hormonal response, and endocrine function, there are an infinite number of factors that can affect how your body is storing and breaking down calories.