Although COPD is basically a respiratory system disease, its effects are not limited to the respiratory system. In this context, one parameter affected in COPD patients is balance. Recent studies have highlighted the importance of assessing balance and incorporating it into treatment options such as pulmonary rehabilitation. In this context, we aim to diversify the training by using different slope types (downhill, level, uphill) in aerobic exercise training, which is a strong component of pulmonary rehabilitation, and to evaluate the effect of slope type on balance. Testing different types of inclines in aerobic exercise training has the potential to result in different muscular gains. We anticipate that this may result in different balance gains.