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  • Title: Biomechanical effects of fatigue on lower-body extremities during a maximum effort kettlebell swing protocol.
    Author: Levine NA, Baek S, Tuttle N, Alvis HB, Hung CJ, Sokoloski ML, Kim J, Hamner MS, Lee S, Rigby BR, Kwon YH.
    Journal: Sports Biomech; 2023 May 01; ():1-18. PubMed ID: 37126368.
    Abstract:
    Kettlebell training provides multiple health benefits, including the generation of power. The primary purpose of this study was to examine the kinematics and kinetics of lower-body joints during a repeated, maximum effort kettlebell swing protocol. Sixteen resistance and kettlebell swing experienced males performed 10 rounds of a kettlebell swing routine (where one round equates to 30s of swings followed by 30s of rest). Kinematic (i.e., swing duration and angular velocities) and kinetic (i.e., normalised sagittal plane ground reaction force, resultant joint moment [RJM] and power) variables were extracted for the early portion and late portion of the round. Average swing duration and the magnitude of normalised ground reaction forces (GRF) increased within rounds, while hip joint power decreased. Changes in swing duration were minimal, but consistent due to an increase in overall fatigue. An increase in the magnitude of GRF was observed at the end of rounds, which is a potential concern for injury. Hip joint power decreased primarily due to a slower angular velocity. This protocol may be an effective routine for those who are resistance trained with kettlebell swing experience, and who want to optimise power in their exercise program.
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