It is my personal experience with my wife. Many people are suffering with this problem. One most important thing is that by genetic influences it may occur. So every body must be careful if their parents have the problem.
Second thing - How to attack it ? Walking and Exercise with proper food habits. It will take care at least 30 to 40 years. Will it not be sufficient. But many people are not doing diet control, exercise and walking and ultimately suffered. Now start doing exercise or walking at least 6 KM walk in the morning. It will take care of you.! DON'T WORRY ! BE PRACTICE IT! IT SHOULD BE A WAY OF LIFE?