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Differences between accelerometer cut point methods among midlife women with cardiovascular risk markers
Danielle Arigo1, Jacqueline A Mogle2, Megan M Brown1
1Department of Psychology, Rowan University, Glassboro, NJ.
Menopause (New York, N.Y.)
|February 13, 2020
Summary
Choosing how to measure physical activity (PA) significantly impacts findings for midlife women at cardiovascular disease (CVD) risk. Different accelerometer cut points yield vastly different results for moderate-to-vigorous PA (MVPA) levels.
Area of Science:
- Cardiovascular Health
- Exercise Physiology
- Biomedical Measurement
Background:
- Midlife women face increased cardiovascular disease (CVD) risk.
- Physical activity (PA) is crucial for mitigating CVD risk in this demographic.
- Accurate measurement of moderate-to-vigorous physical activity (MVPA) is essential for effective health recommendations.
Purpose of the Study:
- To examine differences in MVPA quantification among midlife women with CVD risk using four common accelerometer cut point methods.
- To assess the impact of varying cut points on PA engagement estimates, especially after the removal of 10-minute bout requirements.
Main Methods:
- A two-phase study involving 65 midlife women with an additional CVD risk factor.
- Participants wore accelerometers for seven days to measure PA.
- Four distinct quantification methods (Freedson, Matthews, Swartz, Troiano) were used to calculate light and MVPA minutes.
Main Results:
- Significant differences (P < 0.0001) were observed between the four MVPA quantification methods.
- Two methods (Freedson, Troiano) indicated participants barely met daily MVPA recommendations, while two others (Matthews, Swartz) showed significant overachievement.
- Variations were partly attributed to short bursts of MVPA, as differences decreased when analyzing 10-minute bouts.
Conclusions:
- The choice of PA quantification method critically influences the assessment of MVPA in midlife women with CVD risk.
- Further research is needed to establish the most appropriate method for accurately measuring PA in this population.
- Standardized measurement protocols are vital for consistent and reliable PA data in clinical and research settings.
