Your body will be in a catabolic state (needs to be to produce fuel). Do you mean a constant state of catabolism? i.e breakdown of muscles/fat etc.? This will only occur is exercise is vigorous and intensive followed by lack of recovery and poor nutrition. When your body is at rest, it enters an anabolic state (building up of muscle tissue etc.).
The main problem with cardio directly after working out is the lack of muscle glycogen (resulting in poor performance), just ensure your "during" exercise nutrition is in check and you should be ok.