BHAN435 Lecture 11: Objective measurements of PA
3 Apr 2017
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Objective measurements of pa: movement continuum, sleep sedentary light pa moderate pa vigorous pa . Physically active: meeting established guidelines for pa, described as achieving the minimum recommended amount of pa. Physical inactivity: absence of physical activity, reflected as the amount or proportion of time not engaged in pa of some predetermined intensity. Sedentary: distinct class of behaviors characterized by little physical movement and low energy expenditure (<1. 5 mets, dimensions of pa (fitt, frequency, intensity, time/duration, type, objective measures of pa, pedometers. Pros: moderate/low cost, measures step counts/day, some measure distance and hr, memory varies, some allow data to be downloaded or linked to an app, worn on hip or wrist (anobtrusive) Cons: measurements accuracy varies by device, primarily measures steps only, hr monitors. Chest strap hr monitors detect the electrical signal of ventricular contraction. Pros: accurate when worn correctly, helps people exercise in their target heart rate. Cons: can be expensive, some medications alter the hr response, accelerometers.
