Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Search research articles

Related Experiment Video

Updated: Jul 17, 2026

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity

Published on: March 7, 2019

Discrepancies between methods of identifying objectively determined physical activity.

Sandra A Ham¹, Jared P Reis, Scott J Strath

¹Physical Activity and Health Branch, Divisaion of Nutrition and Physical Activity, Centers for Disease Control and Prevention, 4770 Buford Way, Atlanta, GA 30341, USA. SHam@cdc.gov

Medicine and Science in Sports and Exercise

|January 16, 2007

Summary

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Pet Ownership, Successful Aging and Mortality: A Systematic Review of Longitudinal Studies.

The Gerontologist·2026

Same author

Commentary on: Associations of accelerometer-measured light-intensity physical activity with mortality and incidence of cardiovascular disease and cancers: A prospective UK Biobank cohort analysis.

Journal of sport and health science·2026

Same author

Integration of metabolomic and genetic data reveals novel variants underpinning the human metabolome: the Coronary Artery Risk Development in Young Adults (CARDIA) study.

medRxiv : the preprint server for health sciences·2026

Same author

Effects of different types of exercise over 24 weeks on bone mineral density in postmenopausal women: A systematic review with pairwise and network meta-analysis of randomized controlled trials.

Journal of sport and health science·2026

Same author

Prediction Equations to Estimate Resting Metabolic Rate in Healthy, Community-Dwelling Chinese Older Adults.

Nutrients·2026

Same author

Commentary on: Intensity modifies the association between continuous bouts of physical activity and risk of mortality: A prospective UK Biobank cohort analysis.

Journal of sport and health science·2025

Physical activity (PA) questionnaire validation using accelerometers shows weak agreement. Different accelerometer cut-points significantly alter moderate-to-vigorous PA estimates, impacting study results.

Area of Science:

Exercise physiology
Biomedical engineering
Public health

Background:

Physical activity (PA) questionnaire validation often relies on accelerometers, but typically shows low correlations with self-reported data.
Discrepancies in PA measurement hinder accurate health assessments and intervention evaluations.

Purpose of the Study:

To investigate reasons for weak associations between accelerometer and questionnaire-based PA validation.
To compare established ActiGraph accelerometer intensity cut-points with heart rate reserve (HRR) thresholds for PA intensity.

Main Methods:

Twelve adults simultaneously wore an ActiGraph accelerometer and heart rate monitor for seven days.
PA bouts were identified using published accelerometer cut-points and compared with intensity classifications based on mean %HRR.

More Related Videos

Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption

Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption

Published on: June 20, 2025

Physical Activity Measurement in Children Accepting Table Tennis Training

Physical Activity Measurement in Children Accepting Table Tennis Training

Published on: July 27, 2022

Related Experiment Videos

Last Updated: Jul 17, 2026

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity

Published on: March 7, 2019

Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption

Assessment of Physical Activity Intensity with Accelerometers and Oxygen Consumption

Published on: June 20, 2025

Physical Activity Measurement in Children Accepting Table Tennis Training

Physical Activity Measurement in Children Accepting Table Tennis Training

Published on: July 27, 2022

Main Results:

Most moderate-intensity PA bouts identified by common ActiGraph cut-points corresponded to very light or light intensities based on %HRR (<45%).
Estimated moderate-intensity PA frequency varied widely (1.1 to 7.0 d/wk) depending on the cut-points used.
The total duration of moderate-to-vigorous PA also varied substantially based on the analysis method.

Conclusions:

The method of analyzing ActiGraph accelerometer data significantly influences the calculated minutes of moderate-to-vigorous PA.
This variability in data analysis methods can lead to large differences in reported PA levels.