Source: Medicine & Science in Sports & Exercise
Summary:
Middle-aged women were given pedometers to record steps taken during the day
Less than 6000 steps/day was considered inactive, 6000-9999 somewhat active, and 10,000 or more regularly active
There was a significant correlation between average steps and body mass index and waist and hip circumference
Conclusion: Higher active subjects, measured by steps per day, had better body composition