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Lecture 3

NUTR 3070 Lecture Notes - Lecture 3: Pedometer, Heart Rate, Quantitative History

Course Code
NUTR 3070
John Dwyer

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Lecture 3: Measuring Physical Activity and sedentariness
If the adequately or inadequately based on the theory
Nice match?
Critique reflecting if the measure is based on theories
Why is it important to Measure PA?
Specify which aspects of PA are important for a particular health outcome
Prevalence of PA in population
Monitor changes in PA over time
Monitor effectiveness of interventions
Consequences of Poor Measurement
Inaccurate estimates of prevalence of PA in population
Incorrect conclusions about outcomes of interventions
Poor quality data on which to base policies
Criteria for Evaluating Measures
Reliability: Activity patterns are different from week to week.
Validity: measuring what you intend to measure
Sensitivity to change
Being non-reactive instruments
Being acceptable to respondent
Acceptable cost of administration
Motion sensors
Cost is proportional to accuracy
Yamax SW-200
Internal mechanism
How many days of monitoring?
Ideally, 7 days
Recommended 3 days
How they can be used
Meeting recommendations
Time trends
Interventions pedometers measure not physical activity really but walking
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