Which skinfold measurement is NOT vertical?

The suprailiac skinfold measurement is taken at an angle, making it distinct from other skinfold sites that are measured vertically. This site is located just above the iliac crest of the pelvis and is generally measured in a diagonal fashion. In contrast, the thigh, chest, and subscapular skinfold measurements are typically performed in a vertical orientation, where the skinfold calipers are applied in a way that aligns with the body’s vertical axis. Understanding these measurement techniques is crucial for accurate body composition assessment, as the angle and positioning can influence the thickness of the skinfold and thus the interpretation of body fat levels.