I know my stomach will never be quite the same as it was before I had a kid but it's been over a year now and my stomach is still hanging onto quite a bit of extra weight. I know diet is important. I've cut down on sweets, caffeine and try to eat as much organic food as possible. That's not doing it though. I need to up my exercise game. Is cardio the best way to do that? How often should I be doing that? Should it be mixed in with strength training? I would love to be able to do something in the twenty to thirty minute range so I can fit it in while my son is sleeping. Is that long enough to really get anything done?