Variability in adherence to an unsupervised exercise prescription in obese women

Rachel C. Colley, A. P. Hills, Trisha M. O'Moore-Sullivan, I. J. Hickman, Johannes B. Prins, N. M. Byrne

Research output: Contribution to journalArticleResearchpeer-review

35 Citations (Scopus)

Abstract

Objective: To measure adherence to a specific exercise prescription (1500 kcal week-1) by objectively quantifying unsupervised exercise energy expenditure (ExEE) in obese women. Design: The 16-week lifestyle intervention consisted of weekly meetings with research staff and promotion of increased ExEE (1500 kcal week-1) and a decreased dietary intake (-500 kcal day-1). Participants: Twenty-nine obese females (body mass index=36.8±5.0 kg m-2, body fat=49.6±3.7%) from a hospital-based lifestyle intervention were included in the analysis. Measurements: ExEE was estimated and monitored weekly using heart rate monitoring, and body composition was measured before and after the intervention by dual-energy X-ray absorptiometry. Results: Free-living adherence to the exercise prescription was variable and, on average, modest such that 14% achieved 1500 kcal week-1, and the average weekly ExEE (768 kcal week-1) represented 51.2% of the total amount prescribed. ExEE was correlated with changes in body weight (r=0.65, P<0.001) and fat mass (r=0.65, P<0.001). Achievement of a 5% weight loss target was dependent on the achievement of an ExEE level of 1000 kcal week-1 (P<0.001). Exercise 'adherers' (>1000 kcal week-1) lost more weight (-9.9 vs -4.1 kg), more fat mass (-6.8 vs -3.0 kg) and more waist circumference (-9.8 vs -5.6 cm) when compared to 'non-adherers' (<1000 kcal week-1). Discussion: Exercise is an integral component of lifestyle interventions aimed at reducing obesity and its complications. However, without accurate and objective measures of ExEE, it is difficult for relationships between exercise and health outcomes to be elucidated. The present study suggests an alternative to self-report to increase the confidence with which conclusions are drawn regarding the role of exercise within lifestyle interventions.

Original languageEnglish
Pages (from-to)837-844
Number of pages8
JournalInternational Journal of Obesity
Volume32
Issue number5
DOIs
Publication statusPublished - May 2008
Externally publishedYes

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Prescriptions
exercise
Exercise
Energy Metabolism
energy expenditure
Life Style
lifestyle
Body Weight Changes
Photon Absorptiometry
dual-energy X-ray absorptiometry
Waist Circumference
waist circumference
body weight changes
Body Composition
Self Report
Adipose Tissue
body fat
body composition
Body Mass Index
body mass index

Cite this

Colley, R. C., Hills, A. P., O'Moore-Sullivan, T. M., Hickman, I. J., Prins, J. B., & Byrne, N. M. (2008). Variability in adherence to an unsupervised exercise prescription in obese women. International Journal of Obesity, 32(5), 837-844. https://doi.org/10.1038/sj.ijo.0803799
Colley, Rachel C. ; Hills, A. P. ; O'Moore-Sullivan, Trisha M. ; Hickman, I. J. ; Prins, Johannes B. ; Byrne, N. M. / Variability in adherence to an unsupervised exercise prescription in obese women. In: International Journal of Obesity. 2008 ; Vol. 32, No. 5. pp. 837-844.
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Colley, RC, Hills, AP, O'Moore-Sullivan, TM, Hickman, IJ, Prins, JB & Byrne, NM 2008, 'Variability in adherence to an unsupervised exercise prescription in obese women' International Journal of Obesity, vol. 32, no. 5, pp. 837-844. https://doi.org/10.1038/sj.ijo.0803799

Variability in adherence to an unsupervised exercise prescription in obese women. / Colley, Rachel C.; Hills, A. P.; O'Moore-Sullivan, Trisha M.; Hickman, I. J.; Prins, Johannes B.; Byrne, N. M.

In: International Journal of Obesity, Vol. 32, No. 5, 05.2008, p. 837-844.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Prins, Johannes B.

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Colley RC, Hills AP, O'Moore-Sullivan TM, Hickman IJ, Prins JB, Byrne NM. Variability in adherence to an unsupervised exercise prescription in obese women. International Journal of Obesity. 2008 May;32(5):837-844. https://doi.org/10.1038/sj.ijo.0803799