How do I shrink my belly? I do about 20-30 minutes walking on the treadmill, and 30 minutes on the stationery bike.

As you may already know, it is not possible to spot reduce, meaning that you cannot target to reduce fat in specific areas of the body. However there are things you can do to combat weight gain and tone your abdominal muscles.

Since you are already spending 50-60 minutes a day doing aerobic exercises, my suggestion is to make sure you are exercising at a high enough intensity. You should be breaking a sweat, and your breathing should be heavier than usual, although you should still be able to speak. A higher intensity will certainly help flatten your tummy.

What I believe will help you most is a full-body, strength-training regime including abdominal exercises such as crunches. Strength training will help build muscle which revs up your metabolism and makes weight loss easier. It will also tone and firm your muscles giving you a more trim appearance and make other daily tasks and chores easier.