A healthy BMI (Body Mass Index) for adults is between 18.5 and 24.9 (weight divided by height, squared x 703). Adults with a BMI of less than 18.5 are considered underweight. Adults with a BMI of 25...
According to your height of 5' 6" your ideal healthy weight is 139 pounds (9st13). Your recommended weight range is between 123 and 154 pounds (8st11-11st).