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Confusion and conflict in assessing the physical activity status of middle-aged men


Reference:

Thompson, D., Batterham, A. M., Markovitch, D., Dixon, N. C., Lund, A. J. S. and Walhin, J. P., 2009. Confusion and conflict in assessing the physical activity status of middle-aged men. PLoS ONE, 4 (2), e4337.

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    Official URL:

    http://dx.doi.org/10.1371/journal.pone.0004337

    Abstract

    Background: Physical activity (including exercise) is prescribed for health and there are various recommendations that can be used to gauge physical activity status. The objective of the current study was to determine whether twelve commonly-used physical activity recommendations similarly classified middle-aged men as sufficiently active for general health. Methods and Findings: We examined the commonality in the classification of physical activity status between twelve variations of physical activity recommendations for general health in ninety men aged 45-64 years. Physical activity was assessed using synchronised accelerometry and heart rate. Using different guidelines but the same raw data, the proportion of men defined as active ranged from to 11% to 98% for individual recommendations (median 73%, IQR 30% to 87%). There was very poor absolute agreement between the recommendations, with an intraclass correlation coefficient (A, 1) of 0.24 (95% CI, 0.15 to 0.34). Only 8% of men met all 12 recommendations and would therefore be unanimously classified as active and only one man failed to meet every recommendation and would therefore be unanimously classified as not sufficiently active. The wide variability in physical activity classification was explained by ostensibly subtle differences between the 12 recommendations for thresholds related to activity volume (time or energy), distribution (e. g., number of days of the week), moderate intensity cut-point (e. g., 3 vs. 4 metabolic equivalents or METs), and duration (including bout length). Conclusions: Physical activity status varies enormously depending on the physical activity recommendation that is applied and even ostensibly small differences have a major impact. Approximately nine out of every ten men in the present study could be variably described as either active or not sufficiently active. Either the effective dose or prescription that underlies each physical activity recommendation is different or each recommendation is seeking the same prescriptive outcome but with variable success.

    Details

    Item Type Articles
    CreatorsThompson, D., Batterham, A. M., Markovitch, D., Dixon, N. C., Lund, A. J. S. and Walhin, J. P.
    DOI10.1371/journal.pone.0004337
    DepartmentsFaculty of Humanities & Social Sciences > Health
    Publisher Statementpone.0004337.pdf: The full text of this article is republished here according to the terms of a Creative Commons Attribution Licence. The article should always be cited as follows: Thompson, D., Batterham, A. M., Markovitch, D., Dixon, N. C., Lund, A. J. S., Walhin, J. P., 2009. Confusion and conflict in assessing the physical activity status of middle-aged men. Plos One, 4 (2)
    RefereedYes
    StatusPublished
    ID Code17558

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