Definition of impervious. 1  1a : not allowing entrance or passage : impenetrable a coat impervious to rainb : not capable of being damaged or harmed a carpet impervious to rough treatment. 2  2 : not capable of being affected or disturbed impervious to criticism.
Ideally, all should aim to keep their waist measurement less than half that of their height, found the scientists. That means a 6ft (72 inch) tall man should aim to keep his waist less than 36 inches, while a 5ft 4in (64 inch) woman should keep hers under 32 inches.They have found that the easy-to-calculate ratio between the two is a better predictor of risk than the most widely measure of obesity, called body mass index (BMI).hat means a 6ft (72 inch) tall man should aim to keep his waist less than 36 inches, while a 5ft 4in (64 inch) woman should keep hers under 32 inches. They have found that the easy-to-calculate ratio between the two is a better predictor of risk than the most widely measure of obesity, called body mass index (BMI).
1 If you can keep your waist circumference to less than half of your height so 91cm for a 183cm tall man, and 81cm for a 163cm woman you will reduce your risk of conditions associated with abdominal fat, such as stroke, heart disease and diabetes(High/low blood sugar).aist to height ratio is a stronger predictor of cardio-metabolic risks than BMI. Waist to height ratio should not be confused with the Waist to hip ratio which has also been used to measure body fat distribution. Waist circumference has a direct correlation with the risk of developing heart diseases.