Kinetics and Kinematics of the Push Press, Push Jerk, and Split Jerk.

Soriano, Marcos A; Jiménez-Ormeño, Ester; Lake, Jason P; McMahon, John J; Gallo-Salazar, César; Mundy, Peter; Comfort, Paul

Abstract

The aim of this study was to explore the kinetics and kinematics across incremental loads with the push press (PP), push jerk (PJ), and split jerk (SJ). Eighteen resistance- trained men performed the 1 repetition maximum (1RM) tests (visit 1) 3–7 days before an incremental loading protocol (60, 75, and 90% 1RM) of the 3 exercises (visit 2). Kinetics and kinematics were derived from force-time data and compared using a repeated- measures analysis of variance with load and exercise as within-subject factors. Dependent variables for the biomechanics as- sessment were categorized as output (power and impulse), driver (force and work), and strategy (displacement and duration) metrics. The interrepetition reliability was assessed using the intraclass correlation coefficient and coefficient of variation. The PP, PJ, and SJ 1RM performance were 89.7 6 15.4, 95.6 6 14.4, and 103.0 6 16.9 kg, respectively. Driver, strategy, and outcome metrics displayed moderate-to-excellent (intraclass correlation coefficient: 0.58–0.98) reliability with acceptable variability (% co- efficient of variation: 2.02–10.00). Increased load resulted in significantly large increases in force, work, displacement, duration, power, and impulse (p , 0.001, h2 p 5 0.534–0.903). Exercise selection had a significant and large effect on power, impulse, work, and force (p , 0.016, h2 p 5 0.387–0.534). There was a significant and large effect of load 3 exercise interaction on work, displacement, and duration (p , 0.019, h2 p 5 0.158–0.220). Practitioners are encouraged to use heavier loads (90 . 75 . 60% 1RM) during the SJ exercise to maximize output, driver, and strategy kinetics and kinematics.

Citation

Soriano, M. A., Jiménez-Ormeño, E., Lake, J. P., McMahon, J. J., Gallo-Salazar, C., Mundy, P., & Comfort, P. (2024). Kinetics and Kinematics of the Push Press, Push Jerk, and Split Jerk. Journal of Strength and Conditioning Research, 38(8), 1359-1365. https://doi.org/10.1519/JSC.0000000000004810

• Journal Article Type: Article
• Publication Date: Aug 1, 2024
• Deposit Date: Dec 13, 2024
• Journal: Journal of strength and conditioning research
• Print ISSN: 1064-8011
• Publisher: Lippincott, Williams & Wilkins
• Peer Reviewed: Peer Reviewed
• Volume: 38
• Issue: 8
• Pages: 1359-1365
• DOI: https://doi.org/10.1519/JSC.0000000000004810
• Keywords: Male, Young Adult, Biomechanical Phenomena, Female, Kinetics, Humans, Adult