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FARNAZ SEIFI-ASGSHAHR - Associate professor,Department of exercise Physiology, Faculty of Education and Psychology,University of Mohaghegh Ardabili, Ardabil, Iran

In this special issue of BioMed Research International, the focus is on lifestyle and in particular physical activity(PA) as a driver for a healthy and long life for older people.As populations continue to extend life expectancy, a central concern is whether the added time comprises yearsof healthy life and promotes a high health-related quality of life into old age. PA is defined as any bodilymovement produced by skeletal muscles that result in energy expenditure. PA encompasses exercise, sports, andphysical activities performed as part of daily living, occupation, leisure, or active transportation. Exercise is asubcategory of PA that is planned, structured, and repetitive and that has as a final or intermediate objective forimprovement or maintenance of physical fitness. Physical function is the capacity of an individual to perform thephysical activities of daily living. Physical function reflects motor function and control, physical fitness, andhabitual PA [۱].