I have lost over 20 kilo since January I did this by putting less calories in than I was using. I stick to the daily plate system and it works well for me and the other people I have manged to encourage onto it. I also feel the BMI is a bit of guess work however it does help some people know they are fat, which is where I was. This next piece was copied from the Livestrong pages.
WHR
The WHtR is calculated by dividing waist size by height, and takes gender into account. As an example, a male with a 32 inch waist who is 5'10" (70 inches) would divide 32 by 70, to get a WHtR of 45.7 percent. The WHtR is thought to give a more accurate assessment of health since the most dangerous place to carry weight is in the abdomen. Fat in the abdomen, which is associated with a larger waist, is metabolically active and produces various hormones that can cause harmful effects, such as diabetes, elevated blood pressure, and altered lipid (blood fat) levels.
Many athletes, both male and female, who often have a higher percentage of muscle and a lower percentage of body fat, have relatively high BMIs but their WHtRs are within a healthy range. This also holds true for women who have a "pear" rather than an "apple" shape.
The following chart helps you determine if your WHtR falls in a healthy range (these ratios are percentages):
WOMEN
• Ratio less than 35: Abnormally Slim to Underweight
• Ratio 35 to 42: Extremely Slim
• Ratio 42 to 46: Healthy
• Ratio 46 to 49: Healthy
• Ratio 49 to 54: Overweight
• Ratio 54 to 58: Seriously Overweight
• Ratio over 58: Highly Obese
MEN
• Ratio less than 35: Abnormally Slim to Underweight
• Ratio 35 to 43: Extremely slim
• Ratio 43 to 46: Healthy
• Ratio 46 to 53: Healthy, Normal Weight
• Ratio 53 to 58: Overweight
• Ratio 58 to 63: Extremely Overweight/Obese
• Ratio over 63: Highly Obese
Alyse's Advice
New research shows that the WHtR, not BMI, is the most accurate assessment tool for health risk. People with the most weight around their waists are at greatest risk of diseases such as heart disease and diabetes. Therefore, since you can't change your height, you should take special care to keep your weight and in particular, abdominal girth in a healthy range by eating nutritiously and exercising regularly.