The studies to date, however, have reported a single point estimate of physical activity (eg, steps or activity counts) and most have had small samples, ie, less than 20. There are now devices that provide more detailed information about the nature of physical activity. The Intelligent BTK animal study Device for Energy Expenditure and Activity (IDEEA) is one such device. It estimates duration and frequency of activity as well as distinguishing the

position of the body in which the activity is undertaken, eg, sitting, lying, standing, walking. In one study using this device, Sakamoto and colleagues (2008) found that nine community-dwelling stroke survivors stood for less time than healthy controls but lay, sat, and walked for about the same amount of time. Our study extends this work by using the IDEEA to examine the free-living physical activity of a larger sample of community-dwelling people with stroke compared with that of age-matched healthy controls. The specific research questions for this study were: 1. What is the duration and frequency of physical activity in community-dwelling people after stroke compared with age-matched healthy controls? A cross-sectional observational study examining the free-living physical activity of ambulatory community-dwelling people with stroke compared with

that of age-matched healthy controls was conducted in Sydney, Australia. Duration and frequency of physical activity was collected over two days. Each participant was randomly allocated a day of the week and wore the activity monitor on this day and again a week later on the same day. The days Pictilisib molecular weight for measurement of free-living physical activity were counterbalanced across the week so that there were the same number of participants represented on each day of theweek. Data were collected from 30 min after dressing until 30 min

prior to undressing. Participants were instructed to carry out their routine activities. Stroke survivors and healthy controls who were living in the community were recruited using advertisements in the local community, including stroke clubs. People with stroke were included in the study if they were over 50 years old, within 1 to 5 years of their whatever first stroke, able to walk 10 m independently, and retired from full-time employment. Healthy controls were included if they were over 50 years old, retired from full-time employment, and had no health problem that interfered with their ability to walk. They were excluded if they could not speak English or if they were unable to follow instructions. Free-living physical activity was collected using the Intelligent Device for Energy Expenditure and Activitya consisting of a recorder and five sets of sensors. The sets of sensors are attached to the front of the chest, the front of each thigh, and underneath each foot using medical tape, and measure angles of body segments and acceleration in two orthogonal directions.