Fat is lost from the body almost exclusively by being burned in muscles. The only way you are ever going to lose fat is if your muscles burn it as fuel. Consistent aerobic exercise reduces body fat, lowers blood concentrations of cholesterol and triglycerides, increases levels of high-density lipoprotein cholesterol, may reduce high blood pressure and lower blood sugar levels. Make sure the fitness program you choose is pratical and convenient. Do things you enjoy.
Variety is both physically and psychologically advantageous.