Do no-pull harnesses actually stop a dog from pulling?

The consensus across specialist subreddits is mixed. Many owners on r/Dogtraining and r/puppy101 report immediate reductions in pulling with front-clip designs, but trainers consistently note that a harness is a management tool, not a substitute for leash training. Some community voices even argue back-clip harnesses can encourage pulling by letting the dog use full-body leverage. Front-clip or dual-clip designs tend to get the most credit.