When these bobbing mannerisms are rhythmic and not lateral, they probably have a neutral effect on the performance.
But try to coach it out of the athlete and you risk setting up unwanted tensions all over the place. That’s the inherent danger in trying to fix what “ain’t broke”. The human body is the supreme accommodating, coping mechanism. What I always admired about Charlie’s coaching was he always knew when to “leave well enough lone”.
guys listen to what Charlie says.don’t fic it if it ain’t broken.veryone has little technical faults which seem big to the trained eye but it works great for them.its quite natural for KC to do this but at the moment he is one of the most technical sound sprinters around.
DB i think had a leg lenght difference or a stride length difference and maybe this caused his action.