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Physical Activity Monitoring: A New Outcome Facing many Challenges, but Yielding Promising Results

Physical activity is a new and challenging outcome in chronic diseases, including COPD. It is a direct measurement of an essential aspect of the patient’s life: the quantity and intensity of the patient’s engagement in daily life. Most patients report that the inability to carry out activities is one of the most disabling aspects of their disease (1). Clearly physical activity is potentially a key aspect to target as an outcome measure for our interventions. Improving physical activity allows the patient to better participate in daily life and –perhaps more importantlymay spin-off long-term health benefits (2).