Between-session reliability and minimal detectable difference of peak tibial acceleration during running on an indoor track.

IF 2 3区医学 Q3 ENGINEERING, BIOMEDICAL

Sports Biomechanics Pub Date : 2025-08-18 DOI:10.1080/14763141.2025.2542274

Zoe Y S Chan, Hannah Dimmick, Reed Ferber, Roy T H Cheung

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Abstract

Peak tibial acceleration (PTA) is commonly used to assess impact loading during running, but the number of strides required for reliable between-session measurement in overground conditions, as well as the minimal detectable difference (MDD), remains unclear. This study evaluated the one-week and three-week reliability of axial and resultant PTA during overground running and determined the minimum number of strides needed for good and excellent reliability. Eleven recreational runners completed three sessions on a 200-m indoor oval track while wearing a tibial-mounted accelerometer. PTA was analysed across different stride intervals, and test-retest reliability was assessed using intraclass correlation coefficients (ICC). Results showed moderate-to-good reliability for axial PTA (ICC = 0.71-0.80 at 1 week, 0.67-0.84 at 3 weeks) and moderate-to-excellent reliability for resultant PTA (ICC = 0.81-0.94 at 1 week, 0.78-0.91 at 3 weeks). Based on our results, we recommend averaging at least 40 strides to achieve good reliability for axial PTA (MDD = 2.93 g), and at least 100 strides to achieve excellent reliability of resultant PTA (MDD = 2.72 g). These findings support the reliability of PTA when evaluating longer-term interventions, such as gait retraining, but researchers should consider stride variability and track curvature when interpreting results.

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室内跑道上跑步时胫骨峰值加速度的组间可靠性和最小可检测差异。

胫骨峰值加速度（PTA）通常用于评估跑步时的冲击负荷，但在地面条件下可靠的间歇测量所需的步数以及最小可检测差异（MDD）仍不清楚。本研究评估了在地上跑步时一周和三周的轴向和由此产生的PTA的可靠性，并确定了良好和优异可靠性所需的最小步数。11名休闲跑步者戴着胫骨上的加速度计，在200米室内椭圆形跑道上完成了三次训练。在不同步幅区间分析PTA，并使用类内相关系数（ICC）评估重测信度。结果显示轴向PTA的信度为中至良好（1周时ICC = 0.71-0.80, 3周时ICC = 0.67-0.84），结果PTA的信度为中至优异（1周时ICC = 0.81-0.94, 3周时ICC = 0.78-0.91）。根据我们的研究结果，我们建议平均至少40步才能获得良好的轴向PTA （MDD = 2.93 g）的可靠性，至少100步才能获得良好的结果PTA （MDD = 2.72 g）的可靠性。这些发现支持PTA在评估长期干预措施（如步态再训练）时的可靠性，但研究人员在解释结果时应考虑步幅变异性和轨迹曲率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sports Biomechanics 医学-工程：生物医学

CiteScore

5.70

自引率

9.10%

发文量

135

审稿时长

>12 weeks

期刊介绍： Sports Biomechanics is the Thomson Reuters listed scientific journal of the International Society of Biomechanics in Sports (ISBS). The journal sets out to generate knowledge to improve human performance and reduce the incidence of injury, and to communicate this knowledge to scientists, coaches, clinicians, teachers, and participants. The target performance realms include not only the conventional areas of sports and exercise, but also fundamental motor skills and other highly specialized human movements such as dance (both sport and artistic). Sports Biomechanics is unique in its emphasis on a broad biomechanical spectrum of human performance including, but not limited to, technique, skill acquisition, training, strength and conditioning, exercise, coaching, teaching, equipment, modeling and simulation, measurement, and injury prevention and rehabilitation. As well as maintaining scientific rigour, there is a strong editorial emphasis on ''reader friendliness''. By emphasising the practical implications and applications of research, the journal seeks to benefit practitioners directly. Sports Biomechanics publishes papers in four sections: Original Research, Reviews, Teaching, and Methods and Theoretical Perspectives.