Kettlebell (KB) training has become popular among recreationally active individuals and athletes as a way to gain functional strength and enhance cardiorespiratory endurance. However, acute responses between different KB workouts have yet to be scientifically evaluated. PURPOSE: The purpose of this study was to compare cardiorespiratory and lactate responses as well as caloric expenditure (CE) between different KB workouts. METHODS: Twenty-five recreationally active college-aged males (n = 8) and females (n = 17) completed both a KB swing and KB circuit workout while oxygen consumption (VO2), heart rate (HR), blood lactate (BLA), and CE were measured. Paired t-tests (significance level p ≤ 0.05) were utilized to determine the existence of significant differences between KB workouts for %VO2max, HR, %HRmax, BLA levels during and after exercise, and CE. RESULTS: Statistical differences were observed between KB swing and circuit workouts for all dependent variables. The circuit workout elicited higher cardiorespiratory, BLA, and CE responses (p = 0.00-0.001) compared to the KB workout. Therefore, the null hypothesis was rejected. CONCLUSIONS: Both the KB swing and circuit workouts met ACSM recommendations to improve cardiorespiratory endurance. Due to the utilization of more muscle mass and the increased production of metabolic waste, the circuit workout enhanced cardiorespiratory responses. Future researchers should aim to test whether a longer workout session could elicit similar results.

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