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Unfavorable influence of structured exercise program on total leisure-time physical activity

Authors

  • N. Wasenius,

    Corresponding author
    1. Department of General Practice and Primary Health Care, University of Helsinki, Helsinki, Finland
    • Corresponding author: Niko Wasenius, Louhenkatu 4-6 A 5, FI-08100 Lohja, Finland. Tel: +358 4437 14921, Fax: +358 9191 27536, E-mail: niko.wasenius@helsinki.fi

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  • M. Venojärvi,

    1. Turku University of Applied Sciences, Turku, Finland
    2. Department of Chronic Disease Prevention, National Institute for Health and Welfare, Turku, Helsinki, Finland
    3. Institute of Biomedicine, Physiology, University of Eastern Finland, Kuopio, Finland
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  • S. Manderoos,

    1. Department of General Practice and Primary Health Care, University of Helsinki, Helsinki, Finland
    2. Department of Chronic Disease Prevention, National Institute for Health and Welfare, Turku, Helsinki, Finland
    3. Department of Health, Functional Capacity, and Welfare, National Institute for Health and Welfare, Turku, Finland
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  • J. Surakka,

    1. Arcada, University of Applied Sciences, Helsinki, Finland
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  • H. Lindholm,

    1. Unit of Health and Work Ability, Finnish Institute of Occupational Health, Helsinki, Finland
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  • O. J. Heinonen,

    1. Paavo Nurmi Centre & Department of Health and Physical Activity, University of Turku, Turku, Finland
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  • J. G. Eriksson,

    1. Department of General Practice and Primary Health Care, University of Helsinki, Helsinki, Finland
    2. Department of Chronic Disease Prevention, National Institute for Health and Welfare, Turku, Helsinki, Finland
    3. Unit of General Practice, Helsinki University General Hospital, Helsinki, Finland
    4. Folkhälsan Research Center, Helsinki, Finland
    5. Vasa Central Hospital, Vasa, Finland
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  • E. Mälkiä,

    1. Department of Health Sciences, University of Jyväskylä, Jyväskylä, Finland
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  • S. Aunola

    1. Department of Health, Functional Capacity, and Welfare, National Institute for Health and Welfare, Turku, Finland
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Abstract

In randomized controlled trials (RCTs), with customized structured physical exercise activity (SPEA) interventions, the dose of leisure-time physical activity (LTPA) should exceed the LTPA dose of the nonexercising control (C) group. This increase is required to substantiate health improvements achievable by exercise. We aimed to compare the dose of SPEA, LTPA, and total LTPA (SPEA + LTPA) between a randomized Nordic walking (NW) group, a power-type resistance training (RT) group, and a C group during a 12-week exercise intervention in obese middle-aged men (n = 144) with impaired glucose regulation. The dose of physical activity was measured with diaries using metabolic equivalents. No significant difference (P > 0.107) between the groups was found in volume of total LTPA. The volume of LTPA was, however, significantly higher (P < 0.050) in the C group than in the NW group, but not compared with the RT group. These results indicate that structured exercise does not automatically increase the total LTPA level, possibly, as a result of compensation of LTPA with structured exercise or spontaneous activation of the C group. Thus, the dose of total LTPA and the possible changes in spontaneous LTPA should be taken into account when implementing a RCT design with exercise intervention.

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