Stroke is the most common cause of adult disability and the third most common cause of death in the UK. Recent international guidelines  recommend reducing sedentary behaviours (sitting/lying) after stroke to reduce risk of subsequent vascular events. Feedback on sedentary behaviour is a key component of future intervention strategies. Validity and acceptability of devices to measure and feedback to stroke survivors is unknown. From a selection, we will determine the most appropriate device for use with ambulatory stroke survivors. Agreement with the gold standard measure of sedentary behaviour (activPAL) and acceptability will be assessed in 40 people during sitting, standing, sit-to-stand and walking. A subgroup of 10 will take the device home for 2 weeks to obtain qualitative data on acceptability. We aim to select an appropriate device to support future intervention development.