Question: how many days a week should you do fasted cardio?
Answer: I also recommend you have a post-workout meal within 30 minutes of your fasted workouts to minimize muscle loss. When I'm dieting for fat loss, I lift weights in a fasted state 5 days per week and do 25 to 30 minutes of HIIT cardio in a fasted state 3 to 4 times per week.