Percentage of subjects with reductions in pain intensity of 2 or more on a 0–9 scale in five different body regions. Intention-to-treat (ITT) analyses among all participants (left column). Participants with pain > = 3 at baseline (right column). On the x-axis 1–2 denotes changes during the first intervention round where the first training group (black bars) performed specific strength training, and 2–3 denotes changes during the second intervention round where the second training group (white columns) performed specific strength training. * significant differences between changes in TG1 and TG2 (chi-square test).