The Relationship Between Core Related Measures and Countermovement Jump With and Without Arm Swing

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Countermovement jump (CMJ) is a fundamental and frequent skill in many physical activities. Arm swing (AS) is mostly combined with CMJ and can improve CMJ performance significantly. Three theories, including “transmission of force” [1], “pull” [2], and “joint torque augmentation” [3], have been suggested in the literature to explain the effects of AS on CMJ. All three theories claimed that trunk played an important role in transferring energy or maintaining stability for AS to benefit CMJ.

Previous studies have indicated that core stability (CS) is very important during transferring energy and maintaining stability [4]. CS is the ability to control the position and motion of the trunk over the pelvis and leg to allow optimum power production [6]. CS is an important part of elite athletes’ training programs.

Therefore, CS plays a crucial role in CMJ with AS. However, inconsistent observation were reported in previous research on the relationship between CS and CMJ performance. Some studies observed the positive results [5], but others disagree. Based on the confounded observations, some researchers suggested that the “specificity” of CS to sport event should be considered [6].

Therefore, we designed 5 core related measures (CRM) based on the previous research [7, 8, 9], which can represent different aspects of CS comprehensively, and aimed to investigate the precise relationship between CS and CMJ height with / without AS.


International Society of Biomechanics Annual Conference (ISB)


Brisbane, Australia

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