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
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Anthropometric and physical performance characteristics of top-elite, elite and non-elite youth female team handball players
TL;DR: It is revealed that non-Elite players compare unfavourably to top-elite international European players in many anthropometric and performance characteristics, and differ in a few characteristics compared to elite European club team players.
Journal ArticleDOI
Exercise, Physical Fitness, and Dietary Habits of First-Year Female Nursing Students:
Amaia Irazusta,Susana María Gil,Fátima Ruiz,Juan Gondra,Andoni Jauregi,Jon Irazusta,Javier Gil +6 more
TL;DR: The results of the present study highlight the need for a greater emphasis on the benefits of regular physical exercise and an adequate nutritional education early in the nursing educational program to encourage students to adopt healthier behaviors and to provide more effective preventivePhysical exercise and nutritional counseling for their future patients.
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Effects of Whole-body Vibration Training on Sprint Running Kinematics and Explosive Strength Performance
TL;DR: The WBV training period of 6 wk produced significant changes in sprint running kinematics and explosive strength performance, with an overall improvement of 2.7% and 7.8%.
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Influence of Type of Muscle Contraction and Gender on Postactivation Potentiation of Upper and Lower Limb Explosive Performance in Elite Fencers
TL;DR: It is concluded that lower body power performance in international level fencers may be negatively affected after isometric contractions and thus they should be advised against using isometric exercises to induce PAP with the protocol prescribed in the present study.
Journal ArticleDOI
Methods of Power-Force-Velocity Profiling During Sprint Running: A Narrative Review
TL;DR: This review focuses on the different equipment and methods used to determine mechanical characteristics of maximal exertion human sprinting, with particular emphasis on the computational theory developed and how this has shaped subsequent methodological approaches.
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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