Every time I go on the WiiFit it tells me that my ideal weight is around 10 stone 5 pounds (BMI 22). However on the chart on the WiiFit is shows the healthy BMI range as 24.99 to 18.5. 24.99 BMI is around 11 stone 9 or 10 pounds for me. In general should the aim of losing weight to get healthy be to get to BMI 22, or just to the top of the healthy weight range? Are there appreciable health benefits for being BMI 22 rather than BMI 24?