Una chica de pueblo

Does anyone know any behind the scenes info about the dance number "Take Me to Broadway" as performed by Bobby Van in this movie? It is comprised of several minutes of hopping. For example, did he do it in one take? Did he have to have special shoes that had major cushioning inside? Whose idea was it to have him perform a dance that consisted only of hopping? As someone who has suffered from shin splints, I think this choreography would make him a prime candidate for that or some other kind of injury as a result of this dance. Did he do special warm-ups? This just struck me as I watching the film on May 21, TCM channel. Some people will think it odd to focus on this, when the major dance number is Ann Miller's, but I just got to thinking . . .