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  • Title: Group- vs home-based exercise training in healthy older men and women. A community-based clinical trial.
    Author: King AC, Haskell WL, Taylor CB, Kraemer HC, DeBusk RF.
    Journal: JAMA; 1991 Sep 18; 266(11):1535-42. PubMed ID: 1880885.
    Abstract:
    OBJECTIVE: --To determine the effectiveness of group- vs home-based exercise training of higher and lower intensities among healthy, sedentary older adults. DESIGN: --Year-long randomized, controlled trial comparing (1) higher-intensity group-based exercise training; (2) higher-intensity home-based exercise training; (3) lower-intensity home-based exercise training; or (4) assessment-only control. SETTING: --General community located in northern California. PARTICIPANTS: --One hundred sixty women and 197 men 50 to 65 years of age who were sedentary and free of cardiovascular disease. One out of nine persons contacted through a community random-digit-dial telephone survey and citywide promotion were randomized. INTERVENTIONS: --For higher-intensity exercise training, three 40-minute endurance training sessions per week were prescribed at 73% to 88% of peak treadmill heart rate. For lower-intensity exercise training, five 30-minute endurance training sessions per week were prescribed at 60% to 73% of peak treadmill heart rate. MAIN OUTCOME MEASURES: --Treadmill exercise test performance, exercise participation rates, and heart disease risk factors. RESULTS: --Compared with controls, subjects in all three exercise training conditions showed significant improvements in treadmill exercise test performance at 6 and 12 months (P less than .03). Lower-intensity exercise training achieved changes comparable with those of higher-intensity exercise training. Twelve-month exercise adherence rates were better for the two home-based exercise training conditions relative to the group-based exercise training condition (P less than .0005). There were no significant training-induced changes in lipid levels, weight, or blood pressure. CONCLUSIONS: --We conclude that (1) this community-based exercise training program improved fitness but not heart disease risk factors among sedentary, healthy older adults; (2) home-based exercise was as effective as group exercise in producing these changes; (3) lower-intensity exercise training was as effective as higher-intensity exercise training in the home setting; and (4) the exercise programs were relatively safe.
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