The more lean muscle mass you have, the more calories your body burns, at rest, asleep, etc.
Muscle being denser than fat, you can reshape your body and wear a smaller size pair of jeans even if the scale doesn;t more.
Personally, I think light weights, lots of reps is a good way to get tired. I say, lift as heavy as you can, even if you only work each body part once a week.
Then, up your cardio to 60 minutes, at a respectable byt not outlandish rate of speed, and eat clena, and eat enough, with good fats in your diet.