Resumen de Assessing pedometer accuracy while walking, skipping, galloping, sliding, and hopping
John Damien Smith, Cynthia Ann Schroeder
The purpose of this study was to determine the accuracy of the pedometer when walking, skipping, galloping, sliding, and hopping. One hundred-two college students were fitted with a pedometer (Walk4Life LS-7010) at mid-thigh on the right and left of the hip. Participants then performed the randomly assigned movements for the length (26 m) of a hardwood court playing surface, during which time the investigator tallied the steps with a hand counter. Each step with the lead foot elicited a tally on the counter. Participants were instructed to perform the movement at a brisk pace, to jump-stop at the end of the court, and to remain still until after the pedometer reading was recorded. Repeated measure ANOVAs using the Bonferroni technique were used to compare differences between pedometer counts and hand counts. Significant differences were evident between the hand tally counts and readings from the right and left pedometers during all five locomotor movements (P < .01). Mean error was lowest between the hand tally and the average of the right and left pedometers while walking (-1.35 +/- 1.60) and hopping (-2.94 +/- 2.33), and increased while sliding (-6.42 +/- 4.78), galloping (-8.22 +/- 4.63), and skipping (-8.30 +/- 4.45). Results indicate the pedometer may not consistently register the vertical force produced by the trail foot contact, the lead foot contact, or a combination of the two while skipping, galloping, and sliding. Though the pedometer is a valid instrument when estimating physical activity levels, caution is urged when interpreting movements other than walking.
