1. The purpose of the study was to validate a self-reported sitting time questionnaire across demographically diverse populations. 2. The gold standard method being used was an accelerometer to objectively measure sitting time. 3. They were conducting construct and criterion validity testing by comparing the self-reported sitting times to the objective accelerometer measurements. 4. The subjective measure was the self-reported sitting time questionnaire and the objective measure was the accelerometer. 5. They established validity by calculating correlations between the subjective and objective measures and using Bland-Altman plots to visualize agreement.

1. article review
Lab 6: Obiective and Subjective Measurement of PA and SED Clark, B. K., Lynch, B. M,
Winkler E. A. Gardiner, P. A, Healy, G. N., Dunstan, D. W., & Owen, N (2015). Validity of a
multi-context sitting questionnaire across demographically diverse population groups
International Journal of Behavioral Nutrition and Physical Activity, 12(1), 148. Read the
Abstract of Clark et al., 2015. As indicated review specific parts of the article for the
answers. 1. What is the purpose of the study? 2. What is the gold standard method being
used in this study? 3. W hat type of validity testing are they doing (content, criterion,
construct)? 4. Which measure is subjective and which is objective? 5. What methods are
they using to establish validity? 6. Compare the correlation of the two measurement to the
correlation you calculated in your validation lab. What do you think of the correlation found
in the study? 7. What is a Bland-Altman plot? Review Figure 1 for a visual. 8.Review Table 2.
Compare the mean sitting time from the two devices. How much do participants over- or
under-report sitting time? 9. Think about the conclusion. How would this affect a small
study conducted with a sitting time survey? How would this affect a million person study
with a sitting time survey?Read the Stamatakis & Gill, 2018 articleStamatakis, E, & Gill J. M
(2018) Sitting behaviour and physical activity two sides of the same cardiovascular health
coin?1.Find the main paper of interest reported on in this editorial and review Figure 2 and
summarize the interpretation of that data. Ekelund et al, 2016 (Does physical activity
attenuate, or even eliminate, the detrimental association of sitting time with mortality?
harmonised meta-analysis of data from more than 1 million men and women).2. What do
Stamatakis & Gill (2018) say about the data that Ekelund’s paper was based off of?3. Which
is a better intervention according to Stamatakis & Gill: Reducing sitting time or increasing
physical activity?4. What data do they present to make this claim?5. What is the effect of
substituting sitting with standing when considering improving health?lab 7Read Byrne,
Hills, Hunter, Weinsier, & Schutz, 2005 and answer the following questions:What is the
main point of this article?How does that relate to the typical use of 1 MET being equal to 3.5
ml / kg / min?What are the implications of these findings for the field of exercise science /
kinesiology?Read Ainsworth, 2011 and answer the following questions:What is the
compendium of physical activities?How is it used in research?Do the authors address the 1
MET ? 3.5 ml/kg/min issue?What method is provided by Ainsworth, 2011 to correct for
differences in the standard MET value once the individual’s MET value has been
determined?Assume your RMR was measured and was equal to 2.8 ml/kg/min instead of

2. the standard 3.5 ml/kg/min.How would you adjust your energy expenditure to make up for
this discrepancy?