One in four patients with COPD referred for exercise rehabilitation are frail but nevertheless can respond favourably to rehabilitation and their frailty can be reversed finds a new study. The study led by King's College London and Royal Brompton & Harefield NHS Foundation Trust has wider implications for treating frailty which affects one in ten over-65s where adapting other rehabilitation programmes could potentially benefit more patients. The study measured the prevalence of frailty using a range of tests in 816 patients (average age 70 years) with stable COPD (chronic obstructive pulmonary disease) and looked at whether frailty affected the completion