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首页> 外文期刊>Medicine and science in sports and exercise >Advantage of distance-versus time-based estimates of walking in predicting adiposity
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Advantage of distance-versus time-based estimates of walking in predicting adiposity

机译：基于距离对时间的步行估计在预测肥胖中的优势

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Purpose: Physical activity recommendations are defined in terms of time spent being physically active (e.g., 30 min of brisk walking, 5 d?wk -1). However, walking volume may be more naturally assessed by distance than by time. Analyses were therefore performed to test whether time or distance provides the best metric for relating walking volume to estimated total and regional adiposity. Methods: Linear and logistic regression analyses were used to relate exercise dose to body mass index (BMI), body circumferences, and obesity in a cross-sectional sample of 12,384 female and 3434 male walkers who reported both usual distance walked and time spent walking per week on survey questionnaires. Metabolic equivalent hours per day (MET?h? d -1, 1 MET = 3.5 mL O2?kg -1?min -1) were calculated from the time and pace, or distance and pace, using published compendium values. Results: Average MET-hours per day walked was 37% greater when calculated from time spent walking versus usual distance in women and was 32% greater in men. Per MET-hours per day, declines in BMI and circumferences (slope ± SE) were nearly twice as great, or greater, for distance-versus time-derived estimates for kilograms per squared meter of BMI (females =-0.58 ± 0.03 vs-0.31 ± 0.02, males =-0.35 ± 0.04 vs-0.15 ± 0.02), centimeter of waist circumference (females =-1.42 ± 0.07 vs-0.72 ± 0.04, males =-0.96 ± 0.10 vs-0.45 ± 0.07), and reductions in the odds for total obesity (odds ratio: females = 0.72 vs 0.84, males = 0.84 vs 0.92) and abdominal obesity (females = 0.74 vs 0.85, males = 0.79 vs 0.91, all comparisons significant). Conclusions: Distance walked may provide a better metric of walking volume for epidemiologic obesity research, and better public health targets for weight control, than walking duration. Additional research is required to determine whether these results, derived in a sample that regularly walks for exercise, apply more generally.
机译：目的：根据参加体育锻炼的时间（例如，快走30分钟，5 d？wk -1）来定义体育锻炼建议。但是，步行量可能更自然地通过距离而不是时间来评估。因此，进行了分析以测试时间或距离是否是将步行量与估计的总肥胖和区域肥胖联系起来的最佳指标。方法：采用线性和逻辑回归分析，将运动剂量与体重指数（BMI），体围和肥胖症相关联，该横断面样本包括12384名女性和3434名男性步行者，他们报告了平常的步行距离和步行时间周调查问卷。每天的代谢当量小时数（MET？h？d -1，1 MET = 3.5 mL O2？kg -1？min -1）是根据时间和步长或距离和步长，使用已发布的纲要值计算得出的。结果：根据步行时间计算，每天步行的平均MET小时要比女性的平常距离多37％，而男性则要多32％。每天每MET小时，BMI和周长的下降（斜率±SE）几乎是距离/时间得出的每平方BMI千克的公斤的两倍（或更大）（女性= -0.58±0.03 vs- 0.31±0.02，男性= -0.35±0.04 vs-0.15±0.02），腰围厘米（女性= -1.42±0.07 vs-0.72±0.04，男性= -0.96±0.10 vs-0.45±0.07），并且腰围减小总肥胖率（几率：女性= 0.72 vs 0.84，男性= 0.84 vs 0.92）和腹部肥胖（女性= 0.74 vs 0.85，男性= 0.79 vs 0.91，所有比较均具有显着性）。结论：步行距离可能比步行持续时间为流行病学肥胖症研究提供更好的步行量度，并为控制体重提供更好的公共卫生目标。需要进行更多的研究来确定这些结果是否来自更普遍的应用，这些结果来自定期步行锻炼的样本。

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