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The kettlebell swing has been touted as having both cardiovascular-driven metabolic and strength benefits which several studies have investigated. However, to the authors’ knowledge, none have researched the work economy of the exercise by capturing both mechanical work and metabolic cost. Here, we implement a commonly studied kettlebell swing protocol consisting of short intervals of 20 reps and 30 seconds of rest and compare it to longer intervals of 60 reps followed by 90 seconds of rest. Work-rest ratio was 1:1 for both protocols based on a consistent cadence (short: 36.75 ± 2.12 vs. long: 37.08 ± 1.66 reps/min). Total volume was the same. A group of 6 young adults, familiar with the kettlebell swing, performed both protocols separated by 20 minutes of rest. To calculate total mechanical work performed (J/kg), we used the Noraxon motion capture system. Oxygen consumption (VO2) and other metabolic variables were captured using a metabolic cart (Parvo). We hypothesized that longer intervals might challenge form due to muscle fatigue, thereby changing economy despite matched work-rest ratios and total volume. Contrary to our hypothesis, there is no statistical significance in total mechanical work (short: 1043 ± 261 J/kg vs long: 1159 ± 334 J/kg, paired t-test: p = 0.49) between the two protocols. Similarly, total VO2 (short: 121 ± 14 vs long: 126 ± 15 vs long: mL/kg; paired t-test: p = 0.62) was not significantly different and the total work economy, total VO2 divided by total work, was also not significantly different (short: 0.122 ± 0.031 ml/J vs long: 0.118 ± 0.043 ml/J; paired t-test: p = 0.34). These findings suggest protocols of the same work-rest ratios for the kettlebell swing elicit similar work even with different duration intervals.
Anne Crecelius, Matthew Beerse
Primary Advisor's Department
Health and Sport Science
Stander Symposium, School of Education and Health Sciences
Institutional Learning Goals
"Comparing Amount of Mechanical Work and Metabolic Cost between Two Kettlebell Swing Protocols" (2023). Stander Symposium Projects. 2819.