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
Effect of a vibration exposure on muscular performance and body balance. Randomized cross-over study
Saila Torvinen,Pekka Kannus,Harri Sievänen,Tero A. H. Järvinen,Matti Pasanen,Saija A. Kontulainen,Teppo L. N. Järvinen,Markku Järvinen,Pekka Oja,Ilkka Vuori +9 more
TL;DR: It is shown in this study that a single bout of whole body vibration transiently improves muscle performance of lower extremities and body balance in young healthy adults.
Journal ArticleDOI
Differences in physical fitness and throwing velocity among elite and amateur male handball players.
TL;DR: The present results suggest that more muscular and powerful players are at an advantage in handball, and could partly explain the differences observed between groups in absolute maximal strength and muscle power.
Journal ArticleDOI
Standard Anaerobic Exercise Tests
TL;DR: Maximal anaerobic capcity tests are subdivided into maximal oxygen debt test, ergometric tests (all-out tests and constant load tests), measurement of oxygen deficit during a constant load test and measurement of peak blood lactate.
Journal ArticleDOI
A new method for measuring power output in a single leg extension: feasibility, reliability and validity.
E. J. Bassey,A. H. Short +1 more
TL;DR: As expected, power was lower in women than in men and declined sharply with age; the sex difference was less when the values were expressed as power per body mass; a sharp age-related decline remained.
Journal ArticleDOI
Effect of four-month vertical whole body vibration on performance and balance.
Saila Torvinen,Pekka Kannus,Harri Sievänen,Tero A. H. Järvinen,Matti Pasanen,Saija A. Kontulainen,Teppo L. N. Järvinen,Markku Järvinen,Pekka Oja,Ilkka Vuori +9 more
TL;DR: The 4-month whole body vibration-intervention enhanced jumping power in young adults, suggesting neuromuscular adaptation to the vibration stimulus, and showed no effect on dynamic or static balance of the subjects.
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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