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Reliability of kettlebell swing one and five repetition maximum
James A Ross1, Justin W L Keogh2,3,4, Christian Lorenzen1
1School of Behavioural and Health Sciences, Australian Catholic University, Melbourne, Victoria, Australia.
The kettlebell swing one and five repetition maximum (1RM and 5RM) demonstrated high test-retest reliability. Changes greater than 3.6 kg in kettlebell swing performance indicate a practically significant difference.
Area of Science:
- Exercise Physiology
- Biomechanics
- Strength and Conditioning
Background:
- Limited research exists on assessing kettlebell swing performance.
- Growing popularity of kettlebell training necessitates reliable performance metrics.
- This study addresses the paucity of literature on kettlebell swing test-retest reliability.
Purpose of the Study:
- To establish the test-retest reliability of the one repetition maximum (1RM) kettlebell swing.
- To establish the test-retest reliability of the five repetition maximum (5RM) kettlebell swing.
- To compare kettlebell swing performance with isometric mid-thigh pull (IMTP) strength.
Main Methods:
- Twenty-four recreational resistance-trained individuals participated.
- Participants completed familiarization and three test sessions for 1RM and 5RM kettlebell swings.
- Intra-class correlation (ICC) and coefficient of variation (CV%) were used to assess reliability.
Main Results:
- High test-retest reliability was found for both 1RM (ICC=0.97) and 5RM (ICC=0.98) kettlebell swings.
- Typical error (CV%) was lower than the smallest worthwhile change (SWC%) for both 1RM and 5RM.
- Strong correlations were observed between IMTP peak force and 1RM (r=0.69) and 5RM (r=0.75) kettlebell swings.
Conclusions:
- Kettlebell swing 1RM and 5RM performance is stable after familiarization.
- Practitioners can rely on these measures for tracking progress.
- Changes exceeding 3.6 kg in kettlebell swing performance represent a practically meaningful difference.
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