A meta-analysis of 94 independent studies found that forming implementation intentions ("when situation X arises, I will perform response Y") produced a medium-to-large effect on goal achievement (d = 0.65). This is not a niche finding. It is one of the most robust effects in behavioral psychology.
The mechanism: when you pre-decide your response to a situation, you create an automatic cue-response link. Your brain pre-loads the behavior so that when the cue arrives, you don't need executive function to decide what to do. You just act. For ADHD brains, where executive function is the bottleneck, this bypass is significant.
Gawrilow and Gollwitzer (2008) tested implementation intentions specifically with children who had ADHD. The results showed that if-then planning improved response inhibition, a core ADHD deficit. The intervention worked by compensating for the executive function gap that otherwise prevented the children from following through on their goals.
The Reset Bank applies this directly. When you name a break in advance ("when this task ends, I'll walk around the block"), you've formed an implementation intention. The decision is made. The cue (task completion) triggers the pre-loaded response (walk). No in-the-moment willpower required.