Related Experiment Video
Updated: Jul 6, 2026
Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
Published on: March 7, 2019
Assessment of the physical activity level with two questions: validation with doubly labeled water
1Department of Health Behaviours, The Swedish National Institute of Public Health, Ostersund, Sweden. gunnar.johansson@fhi.se
Objective:
To validate a two-question questionnaire on physical activity with the doubly labeled water (DLW) method.
Design:
Cross-sectional study.
Subjects:
Nine volunteers, age 33-75 years, with a mean body mass index (BMI) (kg m(-2)) of 27.4.
Measurements:
A questionnaire with one question on physical activity at work and one question on physical activity during leisure time. The answers were converted into a PAL (physical activity level=energy expenditure/basal metabolic rate) value, which was validated with the DLW method.
Results:
The mean values (s.d.) of PAL for the questionnaire and DLW measurements were 1.7 (0.1) and 1.7 (0.1), respectively, with a mean difference of 0.004 (0.172).
Conclusions:
The results were promising to the extent that they could be used in large-scale epidemiological studies.
Related Concept Videos
01:23Assessment of the Cardiovascular System I: Subjective Data
Initial Enquiry
Ask the patient about their primary concern and thoroughly explore all reported symptoms.
Medical History
Investigate past illnesses affecting the cardiovascular system, such as angina, anemia, rheumatic fever, congenital heart disease, stroke, thrombophlebitis, dysrhythmias, varicosities
Inquire about symptoms...
01:23Assessment of blood pressure in brachial artery(two-step method)