Evidence suggests moderate levels of physical activity result in a health benefit. Walking is often reported as the physical activity of choice for adults. Accurate measurement of walking activity could provide for self-monitoring and motivating regular physical activity. The purpose was to determine if the pedometer provides reliable and valid measures of the actual number of steps. Forty adult (20–53y) males (N = 17) and females (N = 23) participated by completing three walking trials requiring a 1-hour time commitment. During the first trial (T1), the participants walked four times around a 125m course on a gymnasium floor (total distance = 500m) while wearing a belt with a pedometer on each hip. Two researchers counted each step taken by the participant and pedometer counts were recorded. Trials two (T2) and three (T3) each consisted of participants walking for 15 min on a set course (237m) which covered stairs, corners, and straight-aways. The concurrent validity for T1 exceeded .95 for each pedometer. Instrument objectivity for all trials exceeded .98. The mean difference between right and left pedometers was less than 2 steps for each of T2 and T3. This finding is particularly useful given T2 and T3 averaged approximately 2000 steps each. These data suggest the pedometer is a consistent and truthful measure of the number of steps taken. Therefore, wearing a pedometer to count the number of steps taken would help quantify daily walking activity. Having found an apparently valid measure of step counting, future research is needed to identify 1) validity of other pedometers and accelerometers and 2) the optimal number of steps one should take per day to achieve a health benefit. This research was funded in part by miavita.com, New York.