I think you should do workouts that can help you achieved your goal there are workouts that are made for a certain body part and if you want to lose fat in your torso you have torso twist and this is how it's done.
1. Stand with your legs about a foot apart. Lift your arms out to your sides and bend them at the elbows so that your fists are next to your ears.
2. Lift your left knee to right elbow as you twist your torso. Return to position 1. Repeat for 30 seconds, then switch sides and repeat.
If you want to know more exercises that can help you lose unwanted fats from certain body parts check this page. You can do it and good luck
InsaneBodyShape.com | #1 Trusted Body Building Site