No spot reduction. Strength training will not work to trim fat in certain areas. It will only build and tone muscle, and help burn fat overall. Stability ball. Try working with a stability ball to help strengthen your core muscles. Three times a week. Do weight training three times a week. It's enough to get the benefit, and give your body time to rest in between. Try Lunges. Try doing lunges to strengthen your glutes, quads and thighs all at once. Work the core. Spend time working on your core muscles: abs, back, pelvis and hips. Yoga, Pilates and dancing are all great core strengtheners.