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).
Do you know your number? To measure your waist size correctly, find the halfway point between the bottom of your ribs and your hip bone and wrap the tape measure around. If your waistline measures more than 37 inches (94 cm) for men or 32 inches (80 cm) for women, itâs too wide and putting your health in danger.