Journal ArticleDOI
A simple method for measurement of mechanical power in jumping.
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
Citations
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Journal ArticleDOI
The acute effects of different whole-body vibration amplitudes and frequencies on flexibility and vertical jumping performance.
Vassilis Gerodimos,Andreas Zafeiridis,Konstantina Karatrantou,Theodora Vasilopoulou,Konstantina Chanou,Eleni Pispirikou +5 more
TL;DR: A single WBV bout using a side-to-side alternating vibration plate may increase flexibility which persists for at least 15 min, without altering jumping performance, and these effects were observed irrespective of frequency and amplitude.
Journal ArticleDOI
Validity of two methods for estimation of vertical jump height
Jonathan Ache Dias,Juliano Dal Pupo,Diogo Cunha dos Reis,Lucas Borges,Saray Giovana dos Santos,Antônio Renato Pereira Moro,Noé Gomes Borges +6 more
TL;DR: The prediction equations suggested may allow coaches to measure the vertical jump performance of athletes by the flight time and double integration of vertical reaction force methods, using a CTM or an FP, which represents more practical and viable approaches in the sports field.
Journal ArticleDOI
Effects of an entire season on physical fitness in elite female handball players.
TL;DR: The handball season resulted in significant increases in anthropometric characteristics, physical fitness, and throwing velocity, and the correlations observed suggest the importance of including explosive strength exercises of the knee and elbow extensions.
Journal ArticleDOI
The influence of basketball shoes with increased ankle support on shock attenuation and performance in running and jumping
TL;DR: It is concluded that increased ankle support reduces ankle eversion range but increases shock transmission, and reduces both jumping and running performance.
Journal ArticleDOI
The influence of Ramadan on physical performance measures in young Muslim footballers
TL;DR: Ramadan had little effect on objective tests of physical performance in this sample of youth players observing Ramadan, most likely due to the effects of training and familiarity with the test methods.
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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