Are you talking visceral fat? It's standard for a woman's body to change as she goes through menopause. Specifically, women go from storing fat in their butts and thighs to a more male oriented abdominal fat storage pattern. The primary reasoning for this is that estrogen provides a protective effect against cortisol and once your estrogen levels drop this pattern becomes more evident. The best way to combat this type of fat is to make sure you get 8 hours of sleep, do stress-reducing things like yoga, meditation, listening to music, or just plain relax. Exercise is also an important tool as it builds up stress resistance, but if you are just starting exercise you need to start light and work your way up. Your body operates best if you provide intermittent stressors, and the stress has to be a manageable level or it will be detrimental. If you don't already, make sure you get 10k steps per day. I recommend the fitbit because you can track steps, miles, calories, sleep and you can even log in your food data as well as share info and make fitbit friends to get competitive with. Once you are doing that on a regular basis, strength train a couple of hours a week at a low to moderate intensity(10-12 reps) for 4-6 weeks, then bring the intensity up to what I would consider high intensity (4-8 reps). You should perform exercises for the upper and lower body, but your lower body exercise can be sprints and jumps or other plyometrics.