Sort:  

For me and many others fasted cardio would prove too catabolic, lessen muscle mass and decrease performance. Initially people not attuned to exercise do see some results. Generally if people are training regularly and making wholesome food choices they are insulin efficient and fasted cardio would probably burn less calories long term and reduce strength. My suggestion, pay more attention to macronutrient percentages and shoot for a calorie deficit in overall calorie intake.