将身体活动建议转化为基于计步器的步数目标：30分钟内走3000步。

Translating physical activity recommendations into a pedometer-based step goal: 3000 steps in 30 minutes.

作者信息

Marshall Simon J, Levy Susan S, Tudor-Locke Catrine E, Kolkhorst Fred W, Wooten Karen M, Ji Ming, Macera Caroline A, Ainsworth Barbara E

机构信息

School of Exercise and Nutritional Sciences, San Diego State University, San Diego, California 92182-7251, USA.

出版信息

Am J Prev Med. 2009 May;36(5):410-5. doi: 10.1016/j.amepre.2009.01.021.

DOI:10.1016/j.amepre.2009.01.021

PMID:19362695

Abstract

BACKGROUND

It is a public health recommendation to accumulate at least 150 minutes per week of moderate intensity physical activity. Although pedometers are widely used as a physical activity-monitoring tool, they are unable to measure activity intensity. Translating current physical activity recommendations into a pedometer-based guideline could increase the public health impact of physical activity interventions.

METHODS

A community sample of 97 adults (60% women, with a mean age of 32.1 [+/-10.6] years and a mean BMI of 28.8 [+/-5.5]) completed four 6-minute incremental walking bouts on a level treadmill at 65, 80, 95, and 110 m x min(-1). A calibrated metabolic cart was used to measure energy expenditure at each speed. Steps were measured using a Yamax SW-200 pedometer. Step-rate cut points associated with minimally moderate-intensity activity (defined as 3 METs) were determined using multiple regression, mixed modeling, and receiver operating characteristic (ROC) curves. All data were collected and analyzed in 2006.

RESULTS

For men, step counts per minute associated with walking at 3 METs were 92 step x min(-1) (multiple regression); 101 step x min(-1) (mixed modeling); and 102 step x min(-1) (ROC curve). For women, step counts per minute associated with walking at 3 METs were 91 step x min(-1) (multiple regression); 111 step x min(-1) (mixed modeling); and 115 step x min(-1) (ROC curve). However, for each analysis there was substantial error in model fit.

CONCLUSIONS

Moderate-intensity walking appears approximately equal to at least 100 step x min(-1). However, step counts per minute is a poor proxy for METs, and so 100 step x min(-1) should be used only as a general physical activity promotion heuristic. To meet current guidelines, individuals are encouraged to walk a minimum of 3000 steps in 30 minutes on 5 days each week. Three bouts of 1000 steps in 10 minutes each day can also be used to meet the recommended goal.

摘要

背景

每周累计进行至少150分钟中等强度的体育活动是一项公共卫生建议。尽管计步器被广泛用作体育活动监测工具，但它们无法测量活动强度。将当前的体育活动建议转化为基于计步器的指南可能会增加体育活动干预对公共卫生的影响。

方法

97名成年人（60%为女性，平均年龄32.1[±10.6]岁，平均BMI为28.8[±5.5]）的社区样本在水平跑步机上以65、80、95和110米×分钟⁻¹的速度完成了四次6分钟的递增步行试验。使用校准的代谢车测量每个速度下的能量消耗。使用Yamax SW-200计步器测量步数。使用多元回归、混合模型和受试者工作特征（ROC）曲线确定与最低中等强度活动（定义为3代谢当量）相关的步频切点。所有数据均于2006年收集和分析。

结果

对于男性，与3代谢当量步行相关的每分钟步数为92步×分钟⁻¹（多元回归）；101步×分钟⁻¹（混合模型）；以及102步×分钟⁻¹（ROC曲线）。对于女性，与3代谢当量步行相关的每分钟步数为91步×分钟⁻¹（多元回归）；111步×分钟⁻¹（混合模型）；以及115步×分钟⁻¹（ROC曲线）。然而，对于每项分析，模型拟合都存在较大误差。