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
Three Different Methods of Calculating Vertical Jump Height from Force Platform Data in Men and Women
TL;DR: Based upon the present findings, when using a force platform to calculate vertical jump height, practitioners are encouraged to use the TOV method.
Journal ArticleDOI
Evaluation of Four Vertical Jump Tests: Methodology, Reliability, Validity, and Accuracy
TL;DR: In this paper, the authors evaluate and compare four different methods commonly used to measure vertical jump performance, including body center of mass displacement (VJPT), vertical takeoff velocity as calculated from the force platform, and time in the air (JUMPAIR).
Book
Science and Soccer
TL;DR: Biology and soccer: Biomechanics and soccer medicine, Behavioural science and soccer, and Match analysis as mentioned in this paper, with a focus on match analysis in soccer games.
Journal ArticleDOI
Short-term effects of complex and contrast training in soccer players' vertical jump, sprint, and agility abilities.
TL;DR: From the obtained results, it was suggested that the CCT is an adequate training strategy to develop soccer players' muscle power and speed.
Journal ArticleDOI
Aerobic fitness and yo-yo continuous and intermittent tests performances in soccer players: a correlation study.
TL;DR: Results show that YYETL2 and YYIRTL1, although adopting similar starting and progression speeds, are influenced by different physiological variables, and can be regarded as an aerobic–anaerobic, soccer-specific field test.
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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