Any individual who has an ideal body weight lives longer.
What is an ideal body weight? An ideal body weight is based on a person's height, weight, and bone structure calculation. Any increase in body weight away from the ideal body weight increases your chance of ending up dead before your time is due. However, underweight (that is, a decrease in body weight away from the ideal body weight) is even more dangerous than overweight, because too little body fat does more harm to the body than too much body fat.
The moral here is: maintain an ideal body weight with little deviation. To put you in perspective, your life expectancy will decrease by two to three years for every 10 percent you exceed your "ideal weight." This is worse off for you if you are short in stature, because it is more difficult for you to distribute your fat, as compared to a taller individual.
In addition, the ratio of your waist line to your hip measurement is critical. Therefore, it is in your best interest to lose weight until you attain your ideal body weight.
Use the calculator here to find out if you are overweight.
If you are, then you should strip that fat until you reach your ideal body weight.
For more information on weight loss, go to Weight Loss for Longevity
Stephen Lau