The Health Benefits of Physical Activity


Kelly McGonigal: How to make stress

The Health Benefits of Physical Activity—Major Research Findings

  • Regular physical activity reduces the risk of many adverse health outcomes.
  • Some physical activity is better than none.
  • For most health outcomes, additional benefits occur as the amount of physical activity increases through higher intensity, greater frequency, and/or longer duration.
  • Most health benefits occur with at least 150 minutes a week of moderate-intensity physical activity, such as brisk walking. Additional benefits occur with more physical activity.
  • Both aerobic (endurance) and muscle-strengthening (resistance) physical activity are beneficial.
  • Health benefits occur for children and adolescents, young and middle-aged adults, older adults, and those in every studied racial and ethnic group.
  • The health benefits of physical activity occur for people with disabilities.
  • The benefits of physical activity far outweigh the possibility of adverse outcomes.

The Beneficial Effects of Increasing Physical Activity: It’s About Overload, Progression,
and Specificity

Overload
is the physical stress placed on the body when physical activity is greater in amount or intensity than usual. The body’s structures and functions respond and
adapt to these stresses. For example, aerobic physical activity places a stress on the cardiorespiratory system and muscles, requiring the lungs to move more air and the heart to pump more blood and deliver it to the working muscles. This increase in demand increases the efficiency and capacity of the lungs, heart, circulatory system, and exercising muscles. In the same way, muscle-strengthening and bone-strengthening activities overload muscles and bones, making them stronger.
Progression
is closely tied to overload. Once a person reaches a certain fitness level, he or she progresses to higher levels of physical activity by continued overload and adaptation. Small, progressive changes in overload help the body adapt to the additional stresses while minimizing the risk of injury.

Specificity
means that the benefits of physical activity are specific to the body systems that are doing the work. For example, aerobic physical activity largely benefits the body’s cardiovascular system.

Measuring Physical Activity

Measuring Physical Activity http://www.participaction.com/wp-content/uploads/2012/09/The-January-Research-File_eng.pdf

Physical Activity Measurement http://www.researchgate.net/profile/Stephanie_Schoeppe/publication/6778339_Physical_activity_measurement–a_primer_for_health_promotion/links/02bfe511842852620a000000.pdf

Questionnaires

(These typically require participants to self-report their level of activity)

International Physical Activity Questionnaire (IPAQ) – short and long version, multiple languages https://sites.google.com/site/theipaq/questionnaire_links

Community Healthy Activities Model Program for Seniors (CHAMPS) – available in english and spanish http://dne2.ucsf.edu/public/champs/resources/qxn/

Global Physical Activity Questionnaire – available in multiple languages http://www.who.int/chp/steps/GPAQ/en/

Godin Leisure Time Exercise Questionnaire http://www.godin.fsi.ulaval.ca/Fichiers/Quest/Godin%20leisure-time.pdf

Tests

(These can be used to record a value to the activity level of participants)

6 Minute Walk Test http://www.rehabmeasures.org/Lists/RehabMeasures/DispForm.aspx?ID=895

Push up Test at Home (upper body strength) http://www.topendsports.com/testing/tests/home-pushup.htm

Squat Test at Home (lower body strength) http://www.topendsports.com/testing/tests/home-squat.htm

Sit and Reach Flexibility Test at Home http://www.topendsports.com/testing/tests/home-sit-and-reach.htm

Shoulder Reach Flexibility Test http://www.topendsports.com/testing/tests/shoulder-flexibility.htm

Rehabilitation Measures Database (some tests may be beyond scope of course project) http://www.rehabmeasures.org/default.aspx

Readings

Series on Physical Activity ★ Recommended by Dr. Steven Blair
http://www.thelancet.com/series/physical-activity
Note: Articles in the Series on Physical Activity are available free of charge if you create a username and password.

Energy Balance Basics
http://www.gebn.org/energy-balance-basics

Clinical Guidelines on the Identification, Evaluation, and Treatment of Overweight and Obesity in Adults
http://www.ncbi.nlm.nih.gov/books/NBK2003/

Physical activity and health – A Report of the Surgeon General
http://www.cdc.gov/nccdphp/sgr/index.htm

Exercise & Physical Activity: Your Everyday Guide from the National Institute on Aging
http://www.nia.nih.gov/health/publication/exercise-physical-activity/20-frequently-asked-questions

Physical Activity Guidelines for Americans
http://www.health.gov/paguidelines/guidelines/summary.aspx

Examining The Use of Evidence Based and Social Media Supported Tools in Freely Acessible Physical Activity Internvetion Websites
http://www.researchgate.net/publication/264795563_Examining_the_use_of_evidence-based_and_social_media_supported_tools_in_freely_accessible_physical_activity_intervention_websites

Tools, Calculators and Resources

American Council on Exercise
http://www.acefitness.org/acefit/tools-and-calculators/

Centers for Disease Control & Prevention – Benefits of Physical Activity
http://www.cdc.gov/physicalactivity/everyone/health/index.html?s_cid=cs_284

Physical activity

The Benefits of Physical Activity

Regular physical activity is one of the most important things you can do for your health. It can help:

If you’re not sure about becoming active or boosting your level of physical activity because you’re afraid of getting hurt, the good news is that moderate-intensity aerobic activity, like brisk walking, is generally safe for most people.


Fact sheet N°385
Updated January 2015

Key facts

  • Insufficient physical activity is 1 of the 10 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. Both, moderate and vigorous intensity physical activity brings health benefits.

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, breast 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 1 of the 10 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.

How to increase physical activity?

Both, society in general and individuals can take action to increase physical activity. In 2013, WHO Member States agreed to a target of reducing insufficient physical activity by 10% by 2025 and included strategies to achieve such in the “Global Action Plan for the Prevention and Control of Noncommunicable Diseases 2013-2020”.

Policies to increase physical activity aim to ensure that:

  • in cooperation with relevant sectors physical activity is promoted through activities of daily living;
  • walking, cycling and other forms of active transportation are accessible and safe for all;
  • labour and workplace policies encourage physical activity;
  • schools have safe spaces and facilities for students to spend their free time actively;
  • quality physical education supports children to develop behaviour patterns that will keep them physically active throughout their lives; and
  • sports and recreation facilities provide opportunities for everyone to do sports.

Policies and plans to address physical inactivity have been developed in about 80% of WHO Member States, though these were operational in only 56% of the countries in 2013. National and local authorities are also adopting policies in a range of sectors to promote and facilitate physical activity.