Turning the hips does a lot of subtle things, it impresses a rotational force to the rear wheel helping it to pivot on itself, and a rotational force into the p

Turning the hips does a lot of subtle things, it impresses a rotational force to the rear wheel helping it to pivot on itself, and a rotational force into the pedals to further help the frame to rotate on itself. Further than that, it forces your head to turn into the direction you are heading and your shoulder line to stay parallel with the handlebar. Man, bike-human mechanics are complicated.