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Lifestyle and structured exercise programmes increased physical activity and improved cardiorespiratory fitness

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Question Are lifestyle physical activity programmes as effective as structured exercise programmes for improving physical activity, cardiorespiratory fitness, and risk factors in healthy, sedentary adults?


24 month randomised, single blind (outcome assessor), controlled trial.


An outpatient centre in Dallas, Texas, USA.


237 healthy, sedentary adults (mean age 46 y, 50% women) who lived or worked within 16 km of the centre. Exclusion criteria were history of myocardial infarction, stroke, type 1 diabetes mellitus, osteoporosis, or osteoarthritis; >140% of ideal body weight; plans to move from area or become pregnant; consumption of ≥3 drinks of alcohol each day; exercising ≥3 days each week for ≥20 minutes; hypertension; and use of medication that could …

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  • Sources of funding: National Institutes of Health; and in part Nordic Track, Stairmaster, Cybex, Precor, and Yamax corporations.

  • For correspondence: Dr Andrea L Dunn, The Cooper Institute for Aerobics Research, 12330 Preston Road, Dallas, TX 75230, USA. Fax +1 972 341 3225.