Physical Activity Data in Canada: Why so many numbers? What do they mean? Peter T. Katzmarzyk, PhD, FACSM Queen s University Kingston, ON CANADA

Transcription

1 Physical Activity Data in Canada: Why so many numbers What do they mean Peter T. Katzmarzyk, PhD, FACSM Queen s University Kingston, ON CANADA

2 Questions Definitions of physical activity what do they really represent What is the at risk population Why so many numbers

3 Definitions of Physical Activity Thresholds of Leisure-time Physical Activity <1.5 kcal. kg -1. day kcal. kg -1. day kcal. kg -1. day kcal. kg -1. day kcal. kg -1. day -1

4 Definitions of Physical Activity What are the labels associated with these thresholds <1.5 kcal. kg -1. day kcal. kg -1. day kcal. kg -1. day kcal. kg -1. day -1 Inactive Moderately Active Active Active Children 8.0 kcal. kg -1. day -1 Active Children

5 Definitions of Physical Activity What do these thresholds represent <1.5 kcal. kg -1. day kcal. kg -1. day kcal. kg -1. day kcal. kg -1. day -1 Inactive Moderately Active Active Active Children Walk < 30 minutes Walk minutes Walk 1 hour Walk 2 hours 8.0 kcal. kg -1. day-1 Active Children Walk < 2.5 hours

6 Physical Inactivity Prevalence Prevalence of Physical Inactivity (%) NPHS/CCHS, < 3 KKD Physical Activity Monitor, < 3 KKD NPHS/CCHS, < 1.5 KKD Year of Survey

7 What is the at risk Population There have been shifts in the way physical activity levels have been reported over the years. Prevalence of Physical Activity versus Physical Inactivity Changing Thresholds

8 Prevalence of Physical Activity versus Physical Inactivity 1981 CFS The Physically Active Population 1988 CSWB The Active Population 1995 PAM Level of Physical Inactivity 1997 PAM Trends in Physical Inactivity 1998 PAM Trends in Physical Inactivity 1999 PAM Physical Inactivity of Canadians 2000 PAM Physical Activity Levels CCHS Physical Activity Trends 2005 CCHS Leisure-time Physical Activity

9 Changing Thresholds 1981 CFS The Physically Active Population Average 3+ h/week for 9+ mo/year 1988 CSWB The Active Population 3+ kcal/kg/day 1995 PAM Level of Physical Inactivity < 3 kcal/kg/day 1997 PAM Trends in Physical Inactivity < 3 kcal/kg/day 1998 PAM Trends in Physical Inactivity < 3 kcal/kg/day 1999 PAM Physical Inactivity of Canadians < 3 kcal/kg/day 2000 PAM Physical Activity Levels Various thresholds CCHS Physical Activity Trends Inactive < 1.5 kcal/kg/day Mod. Active kcal/kg/day Active 3+ kcal/kg/day 2005 CCHS Leisure-time Physical Activity Inactive < 1.5 kcal/kg/day Active or Mod. Active kcal/kg/day

10 Prevalence of Physical Activity versus Physical Inactivity Moving Targets Federal, provincial and territorial Ministers responsible for sport, recreation and fitness set a goal to decrease the proportion of Canadians who are physically inactive by 10% by Québec City, April 30, Federal, provincial and territorial Ministers responsible for sport, recreation and fitness today adopted the new Canadian Policy Against Doping in Sport. Goals and objectives have been identified to increase physical activity levels by 10 percentage points in provinces and territories by the year 2010.

11

12 Why so many numbers

13 Summary THE END

14 Definitions of Physical Activity What do the Thresholds Represent Please note a classification of active represents an average daily energy expenditure of at least 3 kilocalories per kilogram (KKD) of body weight during the previous 12 months. Moderately active represents average energyexpenditure values that are greater than 1.5 and less than 3.0 KKD. Inactive corresponds to average energyexpenditure values of less than or equal to 1.5. For the purposes of goal reporting, physical activity combines moderately and active categories (1.5 KKD or greater). Active, if they walked at least 1 hour every day (3.0+ KKD); Moderately active, if they walked 1/2 hour every day ( KKD); and, Inactive, if they walked no more than 1/4 hour every day (<1.5 KKD).

15 Physical Activity Prevalence Leisure-time physical activity Definition: Respondents are classified as active, moderately active or inactive based on an index of average daily physical activity over the past 3 months. For each leisure time physical activity engaged in by the respondent, an average daily energy expenditure is calculated by multiplying the number of times the activity was performed by the average duration of the activity by the energy cost (kilocalories per kilogram of body weight per hour) of the activity. The index is calculated as the sum of the average daily energy expenditures of all activities. Respondents are classified as follows: 3.0 kcal/kg/day or more = physically active; kcal/kg/day = moderately active; less than 1.5 kcal per day = inactive