J Orthop Sports Phys Ther. 2018 Nov;48(11):873-877. doi: 10.2519/jospt.2018.8169. Epub 2018 Jun 22.
Overweight and obese novice runners are subjected to a higher load per stride than their normal-weight peers. Do they reduce their running dose accordingly when beginning a self-chosen running regime?
To describe and compare the preferred running dose in normal-weight, overweight, and obese novice runners when they commence a self-chosen running regime.
In this exploratory, 7-day prospective cohort study, 914 novice runners were categorized into 1 of 3 exposure groups, based on their body mass index (BMI): (1) normal weight (BMI less than 25 kg/m, n = 405; reference group), (2) overweight (BMI of 25 to less than 30 kg/m, n = 341), and (3) obese (BMI of 30 kg/m or greater, n = 168). All runners were equipped with a global-positioning-system running watch, which provided information about distance, duration, speed, and date of each running session during the first week of a self-chosen running regime.
During the first session, overweight runners (difference, -0.5 km/h; 95% confidence interval [CI]: -0.8, -0.2 km/h; P<.05) and obese runners (-1.7 km/h; 95% CI: -2.0, -1.4 km/h; P<.05) ran slower than normal-weight runners. Obese runners also ran a shorter distance compared to normal-weight runners (-0.4 km; 95% CI: -0.7, -0.2 km; P<.05). During the first week, overweight runners (-0.5 km/h; 95% CI: -0.7, -0.2 km/h; P<.05) and obese runners (-1.7 km/h; 95% CI: -2.0, -1.4 km/h; P<.05) ran slower than normal-weight runners, while running distance and duration were similar.
Overweight and obese runners selected a similar training dose to that of normal-weight runners when starting a self-chosen running regime. This may partly explain the higher running-injury risk among overweight and obese runners compared with normal-weight runners observed by other studies. J Orthop Sports Phys Ther 2018;48(11):873-877. Epub 22 Jun 2018. doi:10.2519/jospt.2018.8169.
超重和肥胖的新手跑步者每步承受的负荷比正常体重的同龄人更高。当他们开始自主选择的跑步计划时，他们是否会相应地减少跑步量？
描述并比较正常体重、超重和肥胖的新手跑步者在开始自主选择的跑步计划时的首选跑步量。
在这项探索性的、为期 7 天的前瞻性队列研究中，根据体重指数（BMI）将 914 名新手跑步者分为 3 个暴露组之一：（1）正常体重（BMI<25kg/m，n=405；参考组）、（2）超重（BMI 为 25 至<30kg/m，n=341）和（3）肥胖（BMI 为 30kg/m 或更高，n=168）。所有跑步者都配备了一个全球定位系统跑步手表，该手表可提供自主选择的跑步计划的第一周内每次跑步的距离、持续时间、速度和日期信息。
在第一次跑步中，超重跑步者（差异，-0.5km/h；95%置信区间[CI]：-0.8，-0.2km/h；P<.05）和肥胖跑步者（-1.7km/h；95%CI：-2.0，-1.4km/h；P<.05）的速度比正常体重跑步者慢。肥胖跑步者与正常体重跑步者相比，跑步距离也较短（-0.4km；95%CI：-0.7，-0.2km；P<.05）。在第一周内，超重跑步者（-0.5km/h；95%CI：-0.7，-0.2km/h；P<.05）和肥胖跑步者（-1.7km/h；95%CI：-2.0，-1.4km/h；P<.05）的速度比正常体重跑步者慢，而跑步距离和持续时间相似。
超重和肥胖的跑步者在开始自主选择的跑步计划时选择了与正常体重跑步者相似的训练量。这可能部分解释了与其他研究观察到的相比，超重和肥胖跑步者的跑步受伤风险更高。
肥胖和超重的跑步者在开始自主选择的跑步计划时，选择的训练量与正常体重的跑步者相似。这可能部分解释了与其他研究观察到的相比，肥胖和超重的跑步者跑步受伤风险更高的原因。
