- Smart-phone administered standardized walking test The walking test in the IW app consists of 5 stages; 1) 30 sec. of standing still, 2) 2 min. of slow walking 3) 2 min. of walking at moderate intensity 4) 2 min. walking at high intensity 5) 1 min. walking at highest intensity possible. The four later paces are self-selected. The test is performed with the Smartphone placed at a pocked at the hip and the instructions are communicated auditory through earphones. To ensure the right walking intensity in the intervention period, the patients are asked to perform the test every 4th week.