Bolt is the most physically exceptional sprinter in the documented record. His 1.95 m frame — an extreme outlier for the 100 m — generates a stride length no other sprinter in history has matched. He compensates for a documented poor start through an extended acceleration phase that peaks at 60–80 m, later than any other elite competitor, followed by a velocity hold that outlasts the field. Scoliosis (spinal curvature >40°) produces a 13 mm leg-length asymmetry that biomechanical researchers concluded may have increased, rather than decreased, his speed. He set the world record while celebrating.