HPE100 Lecture Notes - Lecture 6: Systematic Review, Paq, Homicide
6 Jun 2018
School
Department
Course
Professor
HPE 100-Lecture 6
Measurement of physical activity & how active are Australian children
Why Measure PA?
Baseline information
Current population level
Pattern of PA - population segments, geographic differences
Future trends
Identify target populations - at risk due to low PA (dose-response curve)= low
activity at greatest risk
Develop appropriate intervention strategies for specific groups, PA promotion
campaigns
What do we ea by best tools to easure PA? ****
• Reliability – gives accurate, consistent measures
– not affected by different research administrators
– not affected by repeat administrations
– ease of recording
– precision in scoring
• Validity – measures what it claims to measure
– Define the construct of PA (what we mean by amount, level of habitual PA)
– Measuring fitness is not measuring PA
– Measuring skill level is not measuring PA
– What should be included/excluded as PA
How do we measure PA ?
Direct Methods
Heart rate monitors - Polar pacers
Pedometers - mechanical step counters
Accelerometers – records acceleration forces
Calorimetry - Heat released during metabolism (aerobic energy expenditure)
Doubly labelled water – monitors production of CO2 through analysing urine
Oxygen uptake during activity - Physical Work Capacity (intensity of PA)
Heart rate monitor
Advantages
Measures duration and intensity
Disadvantages
Affected by temperature, movement efficiency, illness, weight and stress
find more resources at oneclass.com
find more resources at oneclass.com
Accelerometer
Advantages
Socially acceptable and comfortable to wear
Programmed to turn on and off
Able to store data over long period of time
Records duration, intensity and frequency
Disadvantages
Expensive
Data difficult to interpret
Pedometer
Advantages
Inexpensive
Data easy to interpret
Easy to use
Socially acceptable and comfortable to wear
Ideal for large studies
Disadvantages
Cannot record type, frequency, duration and intensity (just steps)
Cannot monitor low impact activities e.g. cycling
Considering advantages & disadvantages
Cost of device: $20 vs $800
Ease of use
Accuracy
Meaningfulness of measure – counts vs intensity vs forces
Feasibility for population surveys
find more resources at oneclass.com
find more resources at oneclass.com
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Measurement of physical activity & how active are australian children. Pattern of pa - population segments, geographic differences. Identify target populations - at risk due to low pa (dose-response curve)= low activity at greatest risk. Develop appropriate intervention strategies for specific groups, pa promotion campaigns. What do we (cid:373)ea(cid:374) by (cid:862)best(cid:863) tools to (cid:373)easure pa: reliability gives accurate, consistent measures. Precision in scoring: validity measures what it claims to measure. Define the construct of pa (what we mean by amount, level of habitual pa) Measuring skill level is not measuring pa. Calorimetry - heat released during metabolism (aerobic energy expenditure) Doubly labelled water monitors production of co2 through analysing urine. Oxygen uptake during activity - physical work capacity (intensity of pa) Affected by temperature, movement efficiency, illness, weight and stress. Able to store data over long period of time. Cannot record type, frequency, duration and intensity (just steps) Cannot monitor low impact activities e. g. cycling.
