Figure 1.

The descriptive categories and their inter-relationship. Green (circle 1 and its rectangles) symbolises motivators, while red (circle 2 and its rectangles) symbolises barriers. The grey zone between circles 1 and 2 represents the individuals who are considering accepting the implementation of intra-dialytic cycling (motivators) or not (barriers). The descriptive categories 3 and 4 are factors that can either work as motivators (and therefore bring the patients closer to circle 1 or cause them to remain in circle 1) or have the opposite effect and reinforce barriers (and therefore take the patient out from circle 1 towards circle 2 or make the patient more convinced to remain in circle 2). The particular effects of the factors in ovals 3 and 4 depend on the surrounding environment.