No you don’t have to run miles to lose weight, running alone is not the most effective method to losing weight. In fact running alone, you will lose both body fat and lean muscle mass.
A combination of cardio endurance, aerobic, and weight resistance training will be a more effective method to losing weight, while gaining lean muscle mass, toning the body, and improving your physical fitness appearance. With this combination, 100% of your weight lost will be body fat.
Also the additional lean muscle mass will improve your overall body structure, strength, and repair system, while increasing your metabolism, resulting in more calories consumed.
Remember to lose weight you need to burn more calories than you are consuming.