To be clear, exercise tones your body and builds muscle if you lift weights.  Exercise and muscle burn calories.  If you complete a brisk 60 minute walk each day, the following chart shows the calories burned:

Calories Burned in 1 Hour of Walking

Source(s): Harvard Health Publishing 

Now compare the calories burned if you eat just one, yep, just one butter tart:

Country Style Raisin Butter Tart (1 serving) contains 49g total carbs, 48g net carbs, 16g fat, 4g protein, and 350 calories. 

How about one piece of apple pie:

One slice of apple pie can contain between 300 and 400 calories, depending on the size of the pie. For example, a slice of Dutch apple pie (which has a crumb topping) contains 380 calories while a slice of regular apple pie (with a top layer made from pie crust) has 339 calories, according to the USDA. 

What about a 200 gram bag of potato chips which is easy to eat the entire bag?

Nutrition summary:

What about an apple fritter donut?

A bakery glazed apple fritter Apple Fritter Glazed (1 serving) contains 38g total carbs, 36g net carbs, 24g fat, 5g protein, and 380 calories. 

As is evident, any mild to intense exercise you complete is completely negated by poor eating habits.  This is why you MUST control and then eradicate the bad habits that are the foundation of weight gain and the prevent weight loss!  MINDALIGN Technique is the answer!