What is underweigt for a 5 10' male?

An adult wants to have a Body Mass Index (BMI) between 18.5 - 24.9.Therefore, an adultwho is 5'10''and weighs less than 129 lbs. would be considered underweight. However, BMI is based on ageneral formula andhealthy people can fall below this weight. If concerned, one should consult a physician.