Flywheel Exercise: Biomechanics

Flywheel Resistance Exercise: Biomechanical Considerations - this is a version of my recent keynote lecture at the Brazilian Congress of Biomechanics. Flywheel training is an increasingly common form of resistance training, using isoinertial resistance to potentially overload the eccentric phase of the movement. Common flywheel devices include the Exxentric kBox and kPulley. In this video, I present an overview of our sport science research on the biomechanics of flywheel resistance exercise. The video will cover flywheel (isoinertial) resistance exercise, a kinetic and kinematic comparison with other forms of resistance such as a back squat or Smith machine squat, as well as applications to acute post-activation performance enhancement. In doing so, I will discuss the force-velocity relationship, discrete and continious biomechanical analysis methods, coordination and control, post-activation potentiation / performance enhancement, and dynamic correspondence. Subscribe: https://www.youtube.com/c/StuartMcErlainNaylor1?sub_confirmation=1 00:00 Introduction 02:22 What is flywheel resistance exercise? 07:15 Kinematic comparison of flywheel and barbell back squat 17:08 Coordination and control of flywheel squats 33:42 Effect of inertia on velocity and power of flywheel squats 38:53 Kinetic comparison of flywheel and Smith machine squat 46:34 Application of flywheel exercise to acute performance More videos of our research: https://youtube.com/playlist?list=PLI7VLEjUJidC-XY5ZjQxHnBjDZN2g6G4i Other videos mentioned: Muscle mechanics: https://www.youtube.com/watch?v=meRLirTKkhQ Survey of flywheel practitioners - video summary: https://www.youtube.com/watch?v=oaKFb28oun0 Discrete vs continuous analysis lecture: https://www.youtube.com/watch?v=isLDO0iE6kQ SPM in 6 min tutorial: https://www.youtube.com/watch?v=nKyNpoU6-_I Countermovement jump coordination and control: https://www.youtube.com/watch?v=BZQ8ABKaiyQ Key references (in order of appearance): McErlain-Naylor, 2017 (PhD thesis): https://www.researchgate.net/publication/333827844_The_effect_of_joint_compliance_within_rigid_whole-body_computer_simulations_of_impacts de Keijzer et al., 2022 (survey of practitioners): https://www.researchgate.net/publication/354552136_Perception_and_application_of_flywheel_training_by_professional_soccer_practitioners Pataky, 2012 (SPM): https://www.researchgate.net/publication/51491994_One-dimensional_statistical_parametric_mapping_in_Python Pataky, 2010 (SPM): https://www.researchgate.net/publication/43533754_Generalized_n-dimensional_biomechanical_field_analysis_using_statistical_parametric_mapping Robinson et al., 2021 (SPM power analysis): https://www.researchgate.net/publication/351247374_Sample_size_estimation_for_biomechanical_waveforms_Current_practice_recommendations_and_a_comparison_to_discrete_power_analysis McErlain-Naylor & Needham, 2021 (CMJ coordination): https://www.researchgate.net/publication/353514374_Inter-individual_Variation_in_Coordination_and_Control_of_Countermovement_Jumps Needham et al., 2020 (colour mapping): http://eprints.staffs.ac.uk/6206/1/Foot_preproof.pdf McErlain-Naylor & Beato, 2021 (inertia-velocity & inertia-power): https://www.stuartmcnaylor.com/publication/FW_vel_power/McErlain-Naylor_Beato_2020_authorversion.pdf Weakley et al., 2021 (velocity-based training): https://www.researchgate.net/publication/341554144_Velocity-Based_Training_From_Theory_to_Application Blazevich & Babault, 2019 (PAP / PAPE): https://doi.org/10.3389/fphys.2019.01359 Beato et al., 2019 (flywheel vs traditional PAPE): https://doi.org/10.1371/journal.pone.0222466 Beato et al., 2021 (effect of rest period on PAPE): https://www.researchgate.net/publication/329444151_Effects_of_Postactivation_Potentiation_After_an_Eccentric_Overload_Bout_on_Countermovement_Jump_and_Lower-Limb_Muscle_Strength Beato et al., 2021 (medium / high inertia PAPE): https://www.researchgate.net/publication/332343740_Effect_of_Postactivation_Potentiation_After_Medium_vs_High_Inertia_Eccentric_Overload_Exercise_on_Standing_Long_Jump_Countermovement_Jump_and_Change_of_Direction_Performance de Keijzer et al., 2020 (effect of volume on PAPE): https://www.researchgate.net/publication/336699087_Effect_of_Volume_on_Eccentric_Overload-Induced_Postactivation_Potentiation_of_Jumps Beato et al., 2020 (PAPE review paper): https://www.researchgate.net/publication/335600948_Current_Evidence_and_Practical_Applications_of_Flywheel_Eccentric_Overload_Exercises_as_Postactivation_Potentiation_Protocols_A_Brief_Review Beato et al., 2020 (squat / deadlift PAPE): https://www.stuartmcnaylor.com/publication/EOL_SQ_DL/Beato_et_al_2020_authorversion.pdf McErlain-Naylor & Beato, 2021 (vertical / horizontal GRF PAPE): https://doi.org/10.3390/sports9010005 Web: https://www.stuartmcnaylor.com Twitter: https://twitter.com/biomechstu Monthly research newsletter: https://www.stuartmcnaylor.com/newsletter/