An area just above the hip bone level with a vertical line taken the front of the shoulder.
Skinfold analysis is a method used to estimate body fat percentage by measuring the thickness of skinfolds at specific sites on the body. It involves using calipers to pinch and measure the skinfold thickness, typically at the triceps, biceps, subscapular, and suprailiac sites. These measurements are then used in formulas to calculate the body fat percentage. While it is a widely used method, it does have limitations and is subject to some degree of error.