The World Health Organization (WHO) recommends at least 150 minutes of moderate-intensity aerobic exercise, such as brisk walking, per week. Yet, some reports estimate that one-third of Americans fail to get any physical activity at all. The US Centers for Disease Control & Prevention (CDC; Georgia, USA) reports that changes, albeit slow, of taking place with regard to walking. More Americans are now walking for transportation, for fun, relaxation, exercise, or for activities such as walking the dog. The CDC reports that more than six in 10 Americans, or 145 million adults, now include walking as part of their physically active lifestyle. However, the researchers also note that the mean time spent walking fell from 15 minutes (2005) to 30 minutes (2010), the reasons for which are unclear. The CDC urges for individuals to start a walking group of friends and neighbors, help others to walk more safely by driving the speed limit and yielding to people who walk, and to use crosswalks and avoid jaywalking.
