I believe Usain Bolt would run around 9.40 seconds in 100m if he didn’t have scoliosis. An analysis of his running by Michael Johnson suggests that in his starting portions of a race, he tends to move too much laterally, causing him to lose some valuable acceleration which he could’ve got for his drive phase, I believe which in turn is caused by the unfortunate condition of his spine. Being troubled by scoliosis myself, I know how it affects core body movement.