Journal ArticleDOI
A simple method for measurement of mechanical power in jumping.
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TLDR
The new jumping test seems suitable to evaluate the power output of leg extensor muscles during natural motion because of its high reproducibility and simplicity, and is suitable for laboratory and field conditions.Abstract:
A simple test for the measurement of mechanical power during a vertical rebound jump series has been devised. The test consists of measuring the flight time with a digital timer (+/- 0.001 s) and counting the number of jumps performed during a certain period of time (e.g., 15-60 s). Formulae for calculation of mechanical power from the measured parameters were derived. The relationship between this mechanical power and a modification of the Wingate test (r = 0.87, n = 12 males) and 60 m dash (r = 0.84, n = 12 males) were very close. The mechanical power in a 60 s jumping test demonstrated higher values (20 W X kgBW-1) than the power in a modified (60 s) Wingate test (7 W X kgBW-1) and a Margaria test (14 W X kgBW-1). The estimated powers demonstrated different values because both bicycle riding and the Margaria test reflect primarily chemo-mechanical conversion during muscle contraction, whereas in the jumping test elastic energy is also utilized. Therefore the new jumping test seems suitable to evaluate the power output of leg extensor muscles during natural motion. Because of its high reproducibility (r = 0.95) and simplicity, the test is suitable for laboratory and field conditions.read more
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Journal ArticleDOI
Características físicas y antropométricas, y análisis de juego en jugadores de pádel de elite
TL;DR: The anthropometric characteristics of paddle players were slightly different in comparisonto players of other racket sports as mentioned in this paper, with paddle players having less time active than table-tennis and badminton, but more time active thantennis.
Journal ArticleDOI
Acute Effects of Block Jumps in Female Volleyball Players: The Role of Performance Level.
Javier Brazo-Sayavera,Pantelis Theodoros Nikolaidis,Alba Camacho-Cardenosa,Marta Camacho-Cardenosa,Rafael Timón,Pedro R. Olivares +5 more
TL;DR: Findings suggest that EG performance in BJ tends to decrease at the end of a specific jump training practice, and coaches and fitness trainers working with elite volleyball players should focus on exercises to maintain jumping ability during a match.
Journal ArticleDOI
Alpine skiing and anaerobic performance in solid organ transplant recipients.
Giulio Sergio Roi,G. Mosconi,Irene Capelli,Vania Cuna,Elisa Persici,Matteo Parigino,Davide Pisoni,Paola Todeschini,A. Nanni Costa,Sergio Stefoni +9 more
TL;DR: Muscular power and anaerobic performances among a selected group of solid organ transplant recipients were similar to those of the general untrained population.
Journal ArticleDOI
Relationships Among Vertical Jumping Performance, EMG Activation, and Knee Extensor and Flexor Muscle Strength in Turkish Elite Male Volleyball Players
TL;DR: It was concluded that the muscle activity of the knee extensor and flexor muscles changes with change in isokinetic torque at different angular velocity and repetition, and Hamstring/Quadriceps ratios are greatest at an angular velocity of 240°/s.
References
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Journal Article
Utilization of stored elastic energy in leg extensor muscles by men and women
Paavo V. Komi,C Bosco +1 more
TL;DR: The results suggest that although the leg extensor muscles of the men subjects could sustain much higher stretch loads, the females may be able to utilize a greater portion of the stored elastic energy in jumping activities.
Journal ArticleDOI
Biomechanical analysis of knee flexion and extension
TL;DR: For the knee, mathematical analyses for the sagittal plane were performed on data obtained from roentgenograms and a load cell incorporated in a specially constructed force table to find the axis of rotation for the knee displaced 3·2 cm through a 90° range.
Journal ArticleDOI
Storage of Elastic Energy in Skeletal Muscles in Man
TL;DR: It is suggested that the elastic energy is stored in the active muscles, and it is demonstrated that the muscles of the legs are activated in the downward jumps before contact with the platform is established.
Journal ArticleDOI
Measurement of muscular power (anaerobic) in man.
R. Margaria,P. Aghemo,E. Rovelli +2 more
Journal ArticleDOI
Combined effect of elastic energy and myoelectrical potentiation during stretch-shortening cycle exercise
TL;DR: The observed results emphasize that both elastic energy and reflex potentiation may operate effectively during stretch-shortening cycle activity.
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Utilization of stored elastic energy in leg extensor muscles by men and women
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