PA&H- Lecture 4

winniesmith1's version from 2017-03-03 16:39

Section 1

Question Answer
Guideline amount of activity for adults 19-64y150mins a week (moderate) or 75 mins (vigorous), bouts of 10 mins or more. Muscle strength=2 days a week.
inactivity % in UK 30-40% (depending on data)
inactivity % in USA10-20% (depending on data)
weakness of questionnairesbias (social desirability bias), recall, incorrect reading of the question, cultural implications
Instruments in epidemilogical studies must bevalid, reliable, acceptable costs, nonreactive (must not alter pop. behavior it seeks to measure)
Self report data- % meeting guidelines US45%
Self report data- % meeting guidelines UK39%
Self report data- % meeting guidelines Canada52.5%
Objective data- % meeting guidelines for exercise- US5%
Objective data- % meeting guidelines for exercise- UK5%
Objective data- % meeting guidelines for exercise- Canada15.4%

Section 2

Question Answer
What is accelerationChange in velocity over time
What is the basic premise of accelerometrya linear relationship exists between the integral of the modulus of body acceleration and energy expenditure for that activity
What do different MET values mean (/=very hard)
Limitations of AccelerometersCan’t assess EE related to more stationary activities such as cycling, resistance training, paddling sports etc. Can’t account for the excess EE related to incline, load bearing, or uneven surface locomotion. Some models aren’t water‐proof, therefore cannot asses water‐ based activities
What are accelerometers designed to measurelocomotor activities and predict EE based on the oscillation of ones center of gravity (uniaxial, omnidirectional, triaxial)
Accelerometry is fast becoming preferred way to assess PA (at pop. level) why? general consensus in the literature is that accelerometers can provide an accurate indicator of EE for locomotor activities but less precise estimates for free‐living activity. (Welk, 2004)
What does NEAT stand forNon-exercise activity thermogenesis

Section 3