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Twenty-two women aged 53.4±8.6 years (mean ± SD) walked four nights per week for eight weeks at 76% of maximum heart rate in an indoor facility. The women maintained their regular diet as evidenced by comparison of three-day diet records before and during the study. The fitness level of the women improved. Resting heart rate improved from 78.2±9.9 beats per minute (bpm) to 71.4±9.9 bpm after eight...