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
Indicators of maximal hiking performance in Laser sailors.
Benedict Tan,Abdul Rashid Aziz,N. C. Spurway,Candice Toh,Hamish W. Mackie,Wei Xie,James T. Y. Wong,Franz Konstantin Fuss,Kong Chuan Teh +8 more
TL;DR: This cross-sectional observational study measures various knee extensor and hip flexor muscle performance characteristics in 55 Laser sailors and correlates each with the area-under-the-curve hiking moment over 3 min of hiking on a hiking dynamometer (HM180).
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Differences in morphology and force/velocity relationship between Senegalese and Italian sprinters
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Acute and Post-Exercise Physiological Responses to High-Intensity Interval Training in Endurance and Sprint Athletes
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Journal ArticleDOI
Maturational Development as a Key Aspect in Physiological Performance and National-Team Selection in Elite Male Basketball Players.
TL;DR: Maturational status seems to be a key variable that increases the probability of selection for the Portuguese under-16 national team.
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Associations between self-estimated and measured physical fitness among 40-year-old men and women.
TL;DR: This study shows that 40‐year‐old adults can estimate at group level their fitness according to different categories moderately well and can also estimate atgroup level their endurance moderately well by estimating the distance they can run, cycle, ski or walk.
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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