The Plank Test, is a simple fitness test of core muscle strength, and can also be used as a fitness exercise for improving core strength. The aim of this test is to hold an elevated plank position for as long as possible.
It is the best internationally recognized standard in anthropometric measurements to distinguish excess weight from obesity or obesity from thinness from the ideal weight, and it expresses the relationship between a person's weight and height.
The waist-to-hip ratio is taken as a measure of health status, as researchers indicate that people with an apple shape (the waist circumference plus the circumference of the hip) are at greater health risks than those with a pear-shaped body (less circumference at the waist and more at the hip). This is related to obesity and is considered a second measure of obesity in a person.