Final answer:
In skinfold measurements, the chest/pectoral fold is a measurement taken on the pectoralis major muscle. It is performed using calipers to measure the thickness of the skinfold, indicating subcutaneous fat. This measurement is used in sports science and nutrition to assess body composition.
Step-by-step explanation:
In skinfold measurements, the chest/pectoral fold is a measurement taken on the pectoralis major muscle. The pectoralis major is a fan-shaped muscle that covers much of the superior thorax. To measure the skinfold thickness of the chest/pectoral fold, calipers are used to pinch the skin and measure the thickness, which is an indicator of subcutaneous fat.
The chest/pectoral fold is one of several skinfold measurements used to estimate body fat percentage. These measurements are commonly used in sports science and nutrition to assess body composition.
To perform the chest/pectoral fold measurement, the person being measured needs to stand upright with their arms relaxed at their sides. The skinfold is taken on the right side of the chest, halfway between the anterior axillary line (a line drawn vertically from the armpit) and the nipple in males or below the bra strap in females. The calipers are placed perpendicular to the skinfold, and the pinch is held for 1-2 seconds before releasing and recording the measurement.