Male height 1.86m, weight 140 pounds (70kg) is normal, if the weight of 140kg is abnormal belong to obesity, need to reduce weight. For normal adult males, their height and weight relationship can be assessed using the height and weight index BMI, the data numerically for the ratio of height to weight squared. The normal range for this index is 18.5 to 23.9 (in kg/m²), with 28 and above defined as obese. For an adult male with a height of 1.86m, if he weighs 70kg, his BMI is 20.23, which is within the normal range. If he weighs 140kg, his BMI is 40.47, which is considered obese. Obesity has the potential to damage health, it is recommended that weight control, serious obesity is recommended to seek timely medical treatment.