Abs + lower body fat burning workout. Cardio exercises to get slim leg, a toned butt and a flat stomach fast. Workout to lose lower body fat and tone your abdomen at home. Calorie Burn: 100 – 190. Exercise frequency: do the workout 3 times a week to get instant benefits. Fitness Workout Videos by Lumowell (It is of prime importance to consult your doctor before starting these training exercises).