Progression of exercises
fatigue
The exercises progressed from simple to complex, static to dynamic, from wide support surface to narrow support surface and walking. Although our study was performed as a group exercise, the intensity of exercises was determined by taking individual differences into account. The initial exercise intensity of each subgroup was determined according to the minimal Borg Scale individual fatigue level reported in that subgroup during the trial sessions conducted earlier during the qualifying phase of the study. Target training Borg score started at 3–4 (light difficulty) and gradually progressed to 5–6 (medium difficulty). The exercises were started with 5 repetitions, gradually increasing to 8–10 repetitions according to improvements observed by the supervising physiotherapist during the later sessions.