Physical activity is defined as any bodily movement produced by skeletal muscles that requires energy expenditure . Physical activity encompasses all activities, at any intensity, performed during any time of day or night . It includes exercise and incidental activity integrated into daily activity. This integrated activity may not be planned, structured, repetitive or purposeful for the improvement of fitness, and may include activities such as walking to the local shop, cleaning, working, active transport etc. Lack of physical activity is associated with a range of negative health outcomes whereas increased physical activity can improve physical as well as mental health.