It comes down to you have to be in a deficit of calories one way or another. You can do it by either:

1) Eating less

or

2) Forcing your body to burn more calories (ie cardio/physical activity)


I think doing cardio to create the deficit is probably the healthier way about it. You work out your cardiovascular system and you are able to eat more, take in more good nutrients, keep a better balanced diet. However, you don't want your cardio to interfere with your weight training either...

So I would say do as much cardio as you can without it affecting your weight routine. Adjust the rest of your deficit needs with diet adjustments.

IW