介绍:
Physical activity
Key facts
• Insufficient physical activity is one of the leading risk factors for death worldwide.
• Insufficient physical activity is a key risk factor for noncommunicable diseases (NCDs) such as cardiovascular diseases, cancer and diabetes.
• Physical activity has significant health benefits and contributes to prevent NCDs.
• Globally, 1 in 4 adults is not active enough.
• More than 80% of the world's adolescent population is insufficiently physically active.
• Policies to address insufficient physical activity are operational in 56% of WHO Member States.
• WHO Member States have agreed to reduce insufficient physical activity by 10% by 2025.
What is physical activity?
WHO defines physical activity as any bodily movement produced by skeletal muscles that requires energy expenditure – including activities undertaken while working, playing, carrying out household chores, travelling, and engaging in recreational pursuits.
The term "physical activity" should not be confused with "exercise", which is a subcategory of physical activity that is planned, structured, repetitive, and aims to improve or maintain one or more components of physical fitness. Beyond exercise, any other physical activity that is done during leisure time, for transport to get to and from places, or as part of a person’s work, has a health benefit. Further, both moderate- and vigorous-intensity physical activity improve health.
How much of physical activity is recommended?
WHO recommends:
Children and adolescents aged 5-17years
• Should do at least 60 minutes of moderate to vigorous-intensity physical activity daily.
• Physical activity of amounts greater than 60 minutes daily will provide additional health benefits.
• Should include activities that strengthen muscle and bone, at least 3 times per week.
Adults aged 18–64 years
• Should do at least 150 minutes of moderate-intensity physical activity throughout the week, or do at least 75 minutes of vigorous-intensity physical activity throughout the week, or an equivalent combination of moderate- and vigorous-intensity activity.
• For additional health benefits, adults should increase their moderate-intensity physical activity to 300 minutes per week, or equivalent.
• Muscle-strengthening activities should be done involving major muscle groups on 2 or more days a week.
Adults aged 65 years and above
• Should do at least 150 minutes of moderate-intensity physical activity throughout the week, or at least 75 minutes of vigorous-intensity physical activity throughout the week, or an equivalent combination of moderate- and vigorous-intensity activity.
• For additional health benefits, they should increase moderate-intensity physical activity to 300 minutes per week, or equivalent.
• Those with poor mobility should perform physical activity to enhance balance and prevent falls, 3 or more days per week.
• Muscle-strengthening activities should be done involving major muscle groups, 2 or more days a week.
The intensity of different forms of physical activity varies between people. In order to be beneficial for cardiorespiratory health, all activity should be performed in bouts of at least 10 minutes duration.
Benefits of physical activity and risk of insufficient physical activity
Regular physical activity of moderate intensity – such as walking, cycling, or doing sports – has significant benefits for health. At all ages, the benefits of being physically active outweigh potential harm, for example through accidents. Some physical activity is better than doing none. By becoming more active throughout the day in relatively simple ways, people can quite easily achieve the recommended activity levels.
Regular and adequate levels of physical activity:
• improve muscular and cardiorespiratory fitness;
• improve bone and functional health;
• reduce the risk of hypertension, coronary heart disease, stroke, diabetes, various types of cancer (including breast cancer and colon cancer), and depression;
• reduce the risk of falls as well as hip or vertebral fractures; and
• are fundamental to energy balance and weight control.
Insufficient physical activity is one of the leading risk factors for global mortality and is on the rise in many countries, adding to the burden of NCDs and affecting general health worldwide. People who are insufficiently active have a 20% to 30% increased risk of death compared to people who are sufficiently active.
Levels of insufficient physical activity
Globally, around 23% of adults aged 18 and over were not active enough in 2010 (men 20% and women 27%). In high-income countries, 26% of men and 35% of women were insufficiently physically active, as compared to 12% of men and 24% of women in low-income countries. Low or decreasing physical activity levels often correspond with a high or rising gross national product. The drop in physical activity is partly due to inaction during leisure time and sedentary behaviour on the job and at home. Likewise, an increase in the use of "passive" modes of transportation also contributes to insufficient physical activity.
Globally, 81% of adolescents aged 11-17 years were insufficiently physically active in 2010. Adolescent girls were less active than adolescent boys, with 84% vs. 78% not meeting WHO recommendations.
Several environmental factors which are linked to urbanization can discourage people from becoming more active, such as:
• fear of violence and crime in outdoor areas
• high-density traffic
• low air quality, pollution
• lack of parks, sidewalks and sports/recreation facilities.
Story: Finn’s Feather. By Rachel Noble
