Chronic obstructive pulmonary disease (COPD) patients with limited ability to follow exercise protocols may receive smaller benefits from rehabilitation. The association between the ability to follow exercise protocols and short-term outcomes of rehabilitation was assessed in COPD patients.As a measure of the ability to follow exercise protocols, the number of major breaks lasting o1 min was determined in 98 COPD patients during supervised exercise sessions. The benefits from rehabilitation were compared between patients with, on average, more than one and one or fewer major breaks per session.Patients with one or fewer major breaks per session showed significantly greater improvements in exercise capacity (between-groups difference of 38 m for 6-min walking distance, 22

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