Test-retest reliability of performance variables during treadmill rollerski skating.

IF 2.8 3区医学 Q2 PHYSIOLOGY

European Journal of Applied Physiology Pub Date : 2025-03-27 DOI:10.1007/s00421-025-05746-w

Thomas Losnegard, Paul André Solberg, Magne Lund-Hansen, Martin Skaugen, Joar Hansen, Knut Skovereng, Øyvind Sandbakk

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引用次数: 0

Abstract

Purpose: We examined the test-retest reliability of rollerski testing across a familiarization trial followed by three separate test trials (T1-T3) conducted within a 14-day period.

Methods: Ten competitive cross-country skiers performed three sub-maximal tests (5%, speed range 10-16 km h^-1) and a maximal speed test until failure (MTF; ~ 5-8 min, 7%, > 10 km h^-1) on a rollerski treadmill using the Gear 3 ski skating sub-technique. Reliability was assessed as within-subject typical error, expressed as a coefficient of variation (CV%, [confidence limits]) intraclass correlation (ICC, [confidence limits]), and changes in mean (%).

Results: The speed at MTF demonstrated a mean CV (T1-T3) of 1.5% [1.1, 2.6] and an ICC of 0.96 [0.87, 0.99], but a systematic familiarization bias from T1 to T2 (1.2% [0.1, 2.3]) and T2 to T3 (2.2% [0.1, 4.3]). Peak oxygen uptake exhibited a mean CV of 2.2% [1.6, 3.8] and an ICC of 0.93 [0.78, 0.98], with no systematic changes from T1 to T2 (- 0.2% [- 2.0, 1.6]) and T2 to T3 (1.8% [- 1.1, 4.7]). VO₂ at submaximal load showed a mean CV of 2.1% [1.5, 3.3] and an ICC of 0.94 [0.84,0.99], with no systematic changes from T1 to T2 (- 0.7% [- 2.4, 1.1]) and T2 to T3 (- 0.1% [- 2.4, 2.3]).

Conclusion: The relatively low CV and high ICC for most measures suggest a high degree of test-retest reliability. However, the systematic mean changes in MTF indicate that familiarization trials are essential to provide valuable information about individual changes. Overall, these reliability measures can be used as a framework by practitioners to discern true changes when testing on a rollerski treadmill.

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跑步机轮滑过程中表现变量的重测信度。

目的：我们在14天内进行了三个单独的测试试验（T1-T3），并通过熟悉试验检验了轮滑测试的重测信度。方法：10名越野滑雪竞技运动员在轮滑跑步机上使用Gear 3滑雪滑子技术进行了3次亚极限测试（5%，速度范围10-16 km h-1）和一次最大速度直到失败测试（MTF, ~ 5-8 min, 7%, > 10 km h-1）。信度评估为受试者内典型误差，以变异系数（CV%，[置信限]）、类内相关性（ICC，[置信限]）和平均值变化（%）表示。结果：MTF速度的平均CV （T1-T3）为1.5% [1.1,2.6]，ICC为0.96[0.87,0.99]，但从T1到T2（1.2%[0.1, 2.3]）和T2到T3（2.2%[0.1, 4.3]）的系统熟悉偏差。峰值摄氧量平均CV为2.2% [1.6,3.8]，ICC为0.93[0.78,0.98]，从T1到T2（- 0.2%[- 2.0, 1.6]）和T2到T3（1.8%[- 1.1, 4.7]）无系统变化。亚最大负荷下的VO2平均CV为2.1% [1.5,3.3]，ICC为0.94[0.84,0.99]，从T1到T2（- 0.7%[- 2.4, 1.1]）和T2到T3（- 0.1%[- 2.4, 2.3]）没有系统性变化。结论：相对较低的CV值和较高的ICC值表明大多数测量具有较高的重测信度。然而，MTF的系统平均变化表明，熟悉试验对于提供有关个体变化的有价值信息至关重要。总的来说，这些可靠性措施可以作为一个框架，由从业者辨别真正的变化，当测试在轮滑跑步机上。

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

European Journal of Applied Physiology 医学-生理学

CiteScore

6.00

自引率

6.70%

发文量

227

审稿时长

3 months

期刊介绍： The European Journal of Applied Physiology (EJAP) aims to promote mechanistic advances in human integrative and translational physiology. Physiology is viewed broadly, having overlapping context with related disciplines such as biomechanics, biochemistry, endocrinology, ergonomics, immunology, motor control, and nutrition. EJAP welcomes studies dealing with physical exercise, training and performance. Studies addressing physiological mechanisms are preferred over descriptive studies. Papers dealing with animal models or pathophysiological conditions are not excluded from consideration, but must be clearly relevant to human physiology.