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Spinal Column Extension
Intensive scientific research and more than a decade of experiments also proved that most young adults can still increase their height by a few more inches even after the growth plates in their lower bodies have fused (commonly known as "fused bone plates"). This is because besides the length of the femur bone (thighbone), shinbone, and other bones in the lower body, the length of the spinal column in the upper body also significantly contributes to human height (about 35% of the total height).The thicker those disks are, the longer your spinal column is and the taller you become.
Human spinal column consists of 33 separate bone segments known as vertebrae held together by ligaments (tough and fibrous tissue). Out of these 33 vertebrae, only the lowest 9 are fused into two immovable bones, the sacrum and the coccyx, forming the back of the pelvis. All the other 24 vertebrae are permanently movable and thus will never be fused. These 24 vertebrae are the 7 cervical (neck), 12 thoracic (back of chest), and 5 lumbar (loin).
Located between each of these 24 vertebrae are cartilaginous pads called disks. The thickness of the disks determines the length of the spinal column and directly influences the height. There are totally 25 disks, their combined length accounts 25% of your total height.
Since these disks are non-fusible cartilages, they can constantly grow thicker under the stimulation of growth hormone during a lifetime. The thicker those disks are, the longer your spinal column is and the taller you become. Even each disk grows only 0.25 cm (0.1 inch) thicker. Hence, you can still grow 0.25 cm x 25 disks = 6.25 cm (2.5 inches) taller!