Understanding physical activity

ABSTRACT

Although NAYAM News focuses on food, we frequently mention that diet and physical activity are the twin pillars of a healthy lifestyle. In response to reader's requests, NAYAM News therefore presents some perspectives of physical activity in a series of issues. Physical activity is a broad term that emcompasses all forms of muscle movements - bodily movements that are produced by the contraction of the skeletal muscle that increases expenditure above the normal basal level. Physical activity therefore contributes to the movement of the body in such a way that it uses up energy and therefore can be a means by which individuals practice healthy lifestyles. It includes aerobics, strengthening and flexibility activities and ranges from moderate to (walking briskly, hiking, dancing etc.) to vigorous (running/jogging, aerobics, weight lifting etc.). Physical activity can be classified by either its mechanical or metabolic property as muscle contraction is associated with both processes. The physical activities in which individuals participate can be placed in several categories. Such categories include occupational, household, leisure time and transportation. Leisure activity can be further divided into three groups competitive sports (physical activity that is governed by a set of rules), recreation activities (such as hiking, swimming) and exercise training.