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Why is countermovement jump height greater than squat jump height?
Medicine & Science in Sports & Exercise, 1996In the literature, it is well established that subjects are able to jump higher in a countermovement jump (CMJ) than in a squat jump (SJ). The purpose of this study was to estimate the relative contribution of the time available for force development and the storage and reutilization of elastic energy to the enhancement of performance in CMJ compared ...
Bobbert, Maarten F. +3 more
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Jumping height in former elite athletes
European Journal of Applied Physiology, 1999To evaluate lower-limb explosive strength with respect to lifetime athletic activity, we measured vertical jumping height on a contact mat in former male runners (n = 28). soccer players (n = 31), weightlifters (n = 29) and shooters (n = 29) (age range 45 68 years). There were no statistically significant age-adjusted sport-group differences in jumping
J A, Kettunen +3 more
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Optimum Drop Jump Height in Division III Athletes: Under 75% of Vertical Jump Height
International Journal of Sports Medicine, 2017AbstractOur purpose was to evaluate the vertical ground reaction force, impulse, moments and powers of hip, knee and ankle joints, contact time, and jump height when performing a drop jump from different drop heights based on the percentage of a performer’s maximum vertical jump height (MVJH). Fifteen male Division III athletes participated voluntarily.
Peng, HT (Peng, Hsien-Te) +5 more
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INFLUENCE OF TRAINING BACKGROUND ON JUMPING HEIGHT
Journal of Strength and Conditioning Research, 2006The aim of this study was to compare the pattern of force production and center of mass kinematics in maximal vertical jump performance between power athletes, recreational bodybuilders, and physically active subjects. Twenty-seven healthy male subjects (age: 24.5 +/- 4.3 years, height: 178.7 +/- 15.2 cm, and weight: 81.9 +/- 12.7 kg) with distinct ...
Carlos, Ugrinowitsch +4 more
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REBOund: Untethered Origami Jumping Robot with Controllable Jump Height
2020 IEEE International Conference on Robotics and Automation (ICRA), 2020Origami robots are well-suited for jumping maneuvers because of their light weight and ability to incorporate actuation and control strategies directly into the robot body. However, existing origami robots often model fold patterns as rigidly foldable and fail to take advantage of deformation in an origami sheet for potential energy storage.
Jaimie Carlson +3 more
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Maximum height and minimum time vertical jumping
Journal of Biomechanics, 2015The performance criterion in maximum vertical jumping has typically been assumed to simply raise the center of mass as high as possible. In many sporting activities minimizing movement time during the jump is likely also critical to successful performance.
Zachary J, Domire, John H, Challis
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An integrated jumping-crawling robot using height-adjustable jumping module
2016 IEEE International Conference on Robotics and Automation (ICRA), 2016In this paper, we propose a trajectory-adjustable integrated milli-scale jumping-crawling robot with improved ability to overcome obstacles compared to a robot that can only crawl. The robot employs a novel jumping module with enhanced energy storing-capacity and a height-adjustable active trigger.
Gwang-Pil Jung +4 more
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Journal of Strength and Conditioning Research, 2014
The goal of this study was to assess (a) the eccentric rate of force development, the concentric force, and selected time variables on vertical performance during countermovement jump, (b) the existence of gender differences in these variables, and (c) the sport-specific differences.
Guillaume, Laffaye +2 more
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The goal of this study was to assess (a) the eccentric rate of force development, the concentric force, and selected time variables on vertical performance during countermovement jump, (b) the existence of gender differences in these variables, and (c) the sport-specific differences.
Guillaume, Laffaye +2 more
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Pelvic Kinematic Method for Determining Vertical Jump Height
Journal of Applied Biomechanics, 2010Sacral marker and pelvis reconstruction methods have been proposed to approximate total body center of mass during relatively low intensity gait and hopping tasks, but not during a maximum effort vertical jumping task. In this study, center of mass displacement was calculated using the pelvic kinematic method and compared with center of mass ...
Loren Z F, Chiu, George J, Salem
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