Nielsen Rasmus Oestergaard, Bertelsen Michael Lejbach, Parner Erik Thorlund, Sørensen Henrik, Lind Martin, Rasmussen Sten
Department of Public Health, Section of Biostatistics, Aarhus University, DK-8000 Aarhus.
Department of Public Health, Section of Sport Science, Aarhus University, DK-8000 Aarhus.
Int J Sports Phys Ther. 2014 May;9(3):338-45.
Training guidelines for novice runners are needed to reduce the risk of injury. The purpose of this study was to investigate whether the risk of injury varied in obese and non-obese individuals initiating a running program at different weekly distances.
A volunteer sample of 749 of 1532 eligible healthy novice runners was included in a 3-week observational explorative prospective cohort study. Runners were categorized into one of six strata based on their body mass index (BMI) (≤30=low; >30=high) and running distance after 1 week (<3 km = low; 3 to 6 km = medium; >6 km = high). Data was collected for three weeks for the six strata. The main outcome measure was running-related injury.
Fifty-six runners sustained a running-related injury during the 3-week data collection. A significantly greater number of individuals with BMI>30 sustained injuries if they ran between 3 to 6 km (cumulative risk difference (CRD) = 14.3% [95%CI: 3.3% to 25.3%], p<0.01) or more than 6 km (CRD = 16.2% [95%CI: 4.4% to 28.0%], p<0.01) the first week than individuals in the reference group (low distance and low BMI). The effect-measure modification between high running distance and BMI on additive scale was positive (11.7% [-3.6% to 27.0%], p=0.13). The number of obese individuals needed to change their running distance from high to low to avoid one injury was 8.5 [95%CI: 4.6 to 52].
Obese individuals were at greater risk of injury if they exceeded 3 km during the first week of their running program. Because of a considerable injury risk compared with their non-obese peers, individuals with a BMI>30 may be well advised to begin running training with an initial running distance of less than 3 km (1.9 miles) the first week of their running regime. Large-scale trials are needed to further describe and document this relationship.
Level 2b.
需要新手跑步者的训练指南以降低受伤风险。本研究的目的是调查在以不同每周跑步距离开始跑步计划的肥胖和非肥胖个体中，受伤风险是否存在差异。
在一项为期3周的观察性探索性前瞻性队列研究中，纳入了1532名符合条件的健康新手跑步者中的749名志愿者样本。跑步者根据其体重指数（BMI）（≤30 = 低；>30 = 高）和1周后的跑步距离（<3公里 = 低；3至6公里 = 中等；>6公里 = 高）被分为六个层次之一。对这六个层次的数据收集了三周。主要结局指标是与跑步相关的损伤。
在为期3周的数据收集期间，56名跑步者遭受了与跑步相关的损伤。如果BMI>30的个体在第一周跑步3至6公里（累积风险差异（CRD）= 14.3% [95%置信区间：3.3%至25.3%]，p<0.01）或超过6公里（CRD = 16.2% [95%置信区间：4.4%至28.0%]，p<0.01），则与参考组（低距离和低BMI）相比，受伤的个体数量显著更多。高跑步距离和BMI之间在相加尺度上的效应量修正为阳性（11.7% [-3.6%至27.0%]，p = 0.13）。为避免一次受伤，需要将跑步距离从高改为低的肥胖个体数量为8.5 [95%置信区间：4.6至52]。
肥胖个体在跑步计划的第一周如果超过3公里，受伤风险更高。由于与非肥胖同龄人相比存在相当大的受伤风险，建议BMI>30的个体在跑步计划的第一周以初始跑步距离小于3公里（1.9英里）开始跑步训练。需要大规模试验来进一步描述和记录这种关系。
2b级。
