Who was the first to document the use of dry needling by injecting saline into muscles?

The correct choice regarding the documentation of dry needling and the injection of saline into muscles is Dr. Karl Lewit. He is recognized for his contributions to the field, particularly through his work in the 1970s that significantly advanced the practice and understanding of dry needling techniques. His research and clinical observations detailed the efficacy of using dry needling to treat myofascial pain syndromes.

While other figures, such as Dr. Janet Travell, played crucial roles in the development of trigger point therapy and myofascial pain, it was Lewit who specifically documented the technique of dry needling involving saline injections. This distinction is vital in understanding the evolution of the practice and its foundational figures.