i was thinking about doing some dbl cardio on days that i dont lift weights so that would be 2 times a week wednesday and saturday. My first would odbviously be in the morning but when should i do the 2nd? should it be 3 hours after a meal later on in the day? What do i have to change about my diet on those days? ill make all the meals post 2nd cardio all pro/fat is this enough or should i change anything else. Should i eat any carbs at all on a dbl cardio day? My last concern is muscle mass would this harm muscle mass. My sessions currently are 45 mins.
thanks