I have read several articles about this lately. (Thats where I get a lot of my training info since I dont have a trainer. Im solo) There are two good times to do your cardio according to what Ive read.
The first is in the morning, because your body is low on energy and will have to draw from reserves, ie. fat stores, to fuel the cardio session. Also you should take some protein right afterwards because that will help prevent muscle loss due to the cardio session.
The second is to do your cardio session right after your bodybuilding workout. Since you have depleted your glycogen stores during the workout your body has no choice but to use body fat for fuel.
From my personal experience I know that I need to do cardio and like most other things workout related I cycle my cardio sessions. That means that I dont do much cardio during the winter and right before spring, I started at the begining of March, I start to crank it up so that when the warmer weather gets here I look ok in a T-shirt or at the beach. (time wise that gives me 12 to 16 weeks to try and make the needed changes so that I can show off any improvements Ive made during the winter)
As far as which is better, for me, I find I loose about the same amount of weight with the early morning sessions and the after workout ones. However, when I do most of the cardio after my workouts my muscles start to look kinda flat and its harder to get the muscles to pump up during my next workout. If, on the other hand, I do my cardio in the morning (as soon after getting up as I can), go home and eat and delay my workout till later in the day I dont have the problem with being as flat and a pump is easier to get.
I always try and get a pump going. Its almost like getting wood but my whole dang body gets hard, feels good.
Back on topic, oh thats how I do my cardio. How do you guys do it? Im sure you have better Ideas or reasons to do it another way. Point me in the right direction, please. . . . . . . . .Red