I am underweight (?)

Wow. That's a new one. My brother tells me my calves are horrendously huge (even my mum has got leaner calves!) and my legs are a shame *sighs* And then I came across this BMI calculator on the Watsons' site and hey presto! It tells me I'm underweight!?

Your Calculated BMI is: 17.5

UNDERWEIGHT You are under the optimum weight for your height. You could afford to gain a little weight. Being underweight can affect your health. You may develop: Malnourishment - Compromised immune function - Respiratory disease - Tuberculosis - Digestive disease - Cancer - Osteoporosis

BMI Calculator

UNDERWEIGHT = <18.5>

Normal = 18.5-24.9

OVERWEIGHT = 25-29.9

Obesity = >30

Geesh.