No amount of exercise targeted or otherwise will exclusively loose fat around the belly !! - This includes the Plank, Sit ups, Crunches or anything else.
To lose stomach fat you have to throw out the junk food! You are what you eat, so don’t eat junk. Do not keep junk food like cookies, chips, sweets and other similar products in your house. Junk food and addiction to sugar is the greatest cause of belly fat today.
Refined flours and the foods that they create, such as white bread, pasta, donuts, cakes and biscuits (yes, biscuits cause weight gain) should be avoided. They can cause bloating, poor digestion, and lead to accumulation of fat, which is the opposite of how to lose belly fat!
A diet that takes most of its carbs from fruits and vegetables, as opposed to refined flours, is healthier. Learn how the glycemic index works if you want help you to lose weight.
Ideally granary or wholemeal bread should be eaten instead of white bread, and biscuits / cookies and cakes should be avoided. Consuming too much carbohydrate can bump up your insulin level, which can slow down your metabolism. Your body cannot metabolize too much carbohydrate at once because the body does not need so much energy at once. The excess sugar from the carbohydrates will just turn into stomach fat.
Following a natural food idea is a great way to lose belly fat as if combines the rules above, that is you avoid all junk food and all processed food, sugar and saturated fats
Decrease alcohol consumption. If you drink a lot, you will accumulate fat around your waist. Excess alcohol consumption can really give you a belly. Have you seen people who are slim all over but have a beer belly sticking out? Well, that is the effect of excess alcohol consumption.
Alcohol does not contain any nutrients at all. So, all the energy consumed through alcohol will be stored as belly fat! If you want to lose weight fast then you need to stop drinking.