When discussing the gait cycle, you must understand that running isn’t the same as fast walking. The two movements have the same general idea, where the body functions to absorb...
Chiropractors have extensive knowledge on back pain and is a predominant subject within their curriculum. But not all chiropractors treat equally. Some believe in adjusting with limited other treatments, while others treat with more exercises and strengthen the patient.
Physical therapists can do some great work for back pain with rehabilitation and can even manually adjust (not nearly as much training as a chiropractors curriculum).
I can’t directly say one profession is better or worse for back pain because it comes down to the treating clinicians modalities of choice.
Hope this helps.