Results 241 to 250 of about 1,062,117 (285)

INFLUENCE OF TRAINING BACKGROUND ON JUMPING HEIGHT

Journal of Strength and Conditioning Research, 2006
The 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, Valmor, Tricoli, André L F, Rodacki, Mauro, Batista, Mark D, Ricard   +4 more
openaire   +2 more sources

Why is countermovement jump height greater than squat jump height?

Medicine &amp Science in Sports &amp Exercise, 1996
In 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., Gerritsen, Karin G M, Litjens, Maria C A, Van Soest, Arthur J.   +3 more
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Jumping height in former elite athletes

European Journal of Applied Physiology, 1999
To 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, U M, Kujala, H, Räty, S, Sarna   +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, 2017
AbstractOur 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), Khuat, CT (Cong Toai Khuat), Kernozek, TW (Kernozek, Thomas W.), Wallace, BJ (Wallace, Brian J.), Lo, SL (Lo, Shin-Liang), Song, CY (Song, Chen-Yi)   +5 more
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An integrated jumping-crawling robot using height-adjustable jumping module

2016 IEEE International Conference on Robotics and Automation (ICRA), 2016
In 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, Carlos S. Casarez, Sun-Pil Jung, Ronald S. Fearing, Kyu-Jin Cho   +4 more
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Drop jumping. II. The influence of dropping height on the biomechanics of drop jumping

Medicine & Science in Sports & Exercise, 1987
In the literature, athletes preparing for explosive activities are recommended to include drop jumping in their training programs. For the execution of drop jumps, different techniques and different dropping heights can be used. This study was designed to investigate for the performance of bounce drop jumps the influence of dropping height on the ...
Bobbert, M F, Huijing, P A, van Ingen Schenau, G J   +2 more
openaire   +3 more sources

Increase in Jumping Height Associated with Maximal Effort Vertical Depth Jumps

Research Quarterly for Exercise and Sport, 1987
Abstract In order to assess if there existed a statistically significant increase in jumping performance when dropping from different dropping heights, 32 young males, ages 19 to 26, performed a series of maximal effort vertical jumps after dropping from a variable height step onto a force plate. Five trials were performed from each of eight heights of
Bedi J.F., Cresswell A.G., Engel T.J., Nicol S.M.   +3 more
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The relationship of strength and jump height in figure skaters

The American Journal of Sports Medicine, 1990
Eighteen junior elite figure skaters were filmed while performing axel and double axel jumps. These same skaters were assessed for strength of the shoulders, knees, and hips at multiple angular velocities using a Cybex II system. The height of the jumps was signifi cantly correlated with the strength data.
A, Podolsky, K R, Kaufman, T D, Cahalan, S Y, Aleshinsky, E Y, Chao   +4 more
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Maximum height and minimum time vertical jumping

Journal of Biomechanics, 2015
The 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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Injuries in attempted suicide by jumping from a height

Injury, 1988
This study was undertaken to investigate the pattern of injuries and the management of 28 patients who attempted suicide by jumping from a height. Most of the patients had serious psychiatric disorders. All but two of the patients sustained multiple injuries. The most common injury patterns were fractures of the spine and lower extremities.
K, Katz, N, Gonen, I, Goldberg, J, Mizrahi, M, Radwan, Z, Yosipovitch   +5 more
openaire   +2 more sources