期刊
MEDICINE & SCIENCE IN SPORTS & EXERCISE
卷 44, 期 6, 页码 1097-1101出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1249/MSS.0b013e318242a377
关键词
HABITUAL PHYSICAL ACTIVITY; OBJECTIVE ASSESSMENT; SELF-MONITORING; FEEDBACK; COVERT MONITORING; PHYSICAL ACTIVITY PROMOTION
CLEMES, S. A., and N. K. DEANS. Presence and Duration of Reactivity to Pedometers in Adults. Med. Sc,. Sports Exerc., Vol. 44, No. 6, pp. 1097-1101, 2012. Purpose: This study aimed to examine the presence and duration of reactivity to wearing a pedometer and recording daily step counts in free-living adults. Methods: On the first visit to the laboratory, 90 participants (69% were females, age = 26.8 +/- 13.0 yr, body mass index = 23.4 +/- 4.0 kg.m(-2)), blinded to the study aim, were provided with a sealed pedometer (New Lifestyles NL-800) and informed that it was a body posture monitor (covert condition). Participants wore the pedometer throughout waking hours for 1 wk. On their return to the laboratory, stored step counts were recorded, and participants were informed that the device was a pedometer. Participants wore the pedometer unsealed (no restriction on viewing the step count display) for 2 wk, during which they recorded their daily step count in a diary (diary condition). Mean daily step counts recorded during the covert condition and during weeks 1 and 2 of the diary condition were compared using a repeated-measures ANOVA. Results: There was a significant overall effect of study condition (P < 0.001), with post hoc analyses revealing that mean daily step counts reported during the first week of the diary condition (9898 +/- 3002 steps per day) were significantly higher than those reported during the covert condition (8331 +/- 3010 steps per day) and during the second week of the diary condition (8226 +/- 3170 steps per day, P < 0.001). Conclusions: Reactivity to wearing unsealed pedometers and step count recording seems to last for 1 wk. In the absence of any intervention material, step counts return to normal levels during the second week of monitoring and therefore represent a more accurate estimate of habitual activity. These findings have important implications to both researchers and practitioners interested in the use of pedometers for physical activity surveillance and promotion.
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