Why the study?
Does walking exercise training at various intensities and frequencies improve CAD risk factors and fitness in adults compared to usual care?
Does walking exercise training at various intensities and frequencies improve CAD risk factors and fitness in adults compared to usual care?
Higher intensity and more frequent walking exercise yields greater improvements in HDL and fitness compared to unsupervised usual care.
May support higher-intensity frequent walking for CAD risk reduction; leaves open confirmation in randomized trials.
Much is known of the dose-response relationship between exercise training and athletic performance, but less data are available on the relationship between long-term endurance training and health related parameters in adults. PURPOSE: To examine the dose-response relationship between walking and CAD risk factors in adults. METHODS: 492 subjects (315 F, 177 M) were assigned to 5 training groups with various intensities and frequencies and observed for 6 months. High intensity (Hi) was 65–75% of heart rate reserve (HRR) and moderate intensity (Mi) was 45–55% HRR. The Low frequency (Lf) group was instructed to exercise 3–4 sessions/week and the high frequency (Hf) group 5–7 days/week. Usual care (UC) treatment consisted of the American Heart Association exercise recommendations without active supervision. Training duration for all groups was 30 minutes per session. RESULTS: 378 S's (227 F, 151M) completed 6 months. Percent (%Δ) changes (X ± SD) from baseline to 6 months are shown below. *p < 0.05 Hi-Hf vs UC.Table: No Caption AvailableCONCLUSIONS: The results indicate that higher intensity, more frequent exercise bouts resulted in greater changes in HDL and fitness compared to UC.
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Martín et al. (2002) studied this question.
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