While stretching cannot actually make a body actively grow taller, it can fix an individual's posture making him or her stand more upright, which makes him or her appear to be much taller than if they are slouched, as stated by Perimeter Institute. Stretching releases tension and elongates the muscles, allowing for better posture which will make a person appear their true height.
Many sources online claim that stretching in certain ways can make an individual taller. This statement is only part true because stretching cannot stimulate growth, but it does have the potential to make a person appear to be taller. While height is determined by genetics, fixing posture will help an individual maximize his or her height and can have a huge impact on how tall they look while sitting or standing.