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Aerobic exercise consisted of running on a horizontal treadmill at 60% to 85% the heart rate reserve for 30 to 50 minutes 3 times per week for 12 weeks. The Karvonen method was used to estimate heart rate reserve: 70% heart rate reserve = (220 - age - resting heart rate) X (0. The subjects were randomly assigned to three exercise groups: those beginning a regimen at 25% of heart rate reserve and gradually working up to 40% over a 10-week period; those beginning at 40% of heart rate reserve and working to 60% over 10 weeks; and a control group participating in no exercise over the 10-week period. |
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