Why the study?
Physical activity intensity can be expressed as absolute or relative intensity, and methods were needed to obtain individualized relative-intensity accelerometer cut points using maximal graded exercise treadmill test data.
Population
2363 men and women 38 to 50 yr old from the CARDIA fitness study
Comparison
Individualized relative-intensity cut points derived from %HRmax vs RPE models
Design
Cross-sectional methodological study using mixed-effects regression models
Follow-up
Seven consecutive days
Authors
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Relative cut points may refine PA intensity estimates across fitness levels; leaves open outcome associations in cohorts.
Individualized relative-intensity accelerometer cut points based on maximal exercise testing can account for differences in fitness capacity across individuals, providing a more tailored measure of physical activity intensity.
Siddique et al. (2019) studied this question.
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