Test-retest reliability of performance variables during treadmill rollerski skating
Thomas Losnegard1,2, Paul André Solberg3, Magne Lund-Hansen4
1Department of Physical Performance, The Norwegian School of Sport Sciences, Ullevål Stadion, Post Box 4014, 0806, Oslo, Norway. thomasl@nih.no.
European Journal of Applied Physiology
|March 27, 2025
Summary
Rollerski testing shows high reliability for cross-country skiers, but familiarization is key. This study provides a framework for practitioners to track true performance changes in skiers using rollerski treadmills.
Area of Science:
- Sports Science
- Exercise Physiology
- Biomechanical Analysis
Background:
- Cross-country skiing performance relies on efficient technique and physiological capacity.
- Accurate and reliable testing methods are crucial for monitoring athlete progress and training adaptations.
- Rollerski treadmills offer a controlled environment for assessing ski-specific fitness.
Purpose of the Study:
- To determine the test-retest reliability of rollerski testing in competitive cross-country skiers.
- To assess the impact of familiarization trials on test results.
- To establish a reliable framework for practitioners evaluating changes in skiers' performance.
Main Methods:
- Ten competitive cross-country skiers underwent familiarization and three test trials within 14 days.
- Testing included sub-maximal efforts (10-16 km/h) and a maximal test until failure (MTF).
- Reliability was measured using coefficient of variation (CV%) and intraclass correlation (ICC).
Main Results:
- Speed at MTF showed high reliability (CV 1.5%, ICC 0.96) but a familiarization bias.
- Peak oxygen uptake (VO2) demonstrated good reliability (CV 2.2%, ICC 0.93) with no systematic bias.
- VO2 at submaximal loads was reliable (CV 2.1%, ICC 0.94) without systematic changes.
Conclusions:
- Rollerski testing exhibits strong test-retest reliability for most physiological measures.
- Familiarization trials are essential for accurate assessment of maximal speed.
- The findings provide a reliable framework for practitioners to interpret performance changes in skiers.
