Originally Posted by NewChief
There may be some mental benefit for you in separating your weight loss phase from your weight training phase, but there isn't any physiological. You can lift weights the entire time you're losing as well and likely accelerate that weight loss as well as make gains in your strength and overall fitness as you lose.
It isn't even "likely", you lift weights and diet you will lose weight faster than diet and cardio or of course just diet. The general rule I keep reading is that you cardio burns calories for a little bit while lifting continues burns calories for 24 hours.
I loosely follow WW guidelines on food and basically alternate upper/lower lifting days with cardio and core the next. Take a day off every 3 days or so to let the body recover, and I tend to melt away at about 3 lbs a week. For the best weight loss from Cardio HIIT is the best way to go.