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Journal ArticleDOI

Neuromuscular, anaerobic, and aerobic performance characteristics of elite power athletes

TLDR
Various aspects of neuromuscular, anaerobic, and aerobic performance capacity were investigated in four powerlifters, seven bodybuilders, and three wrestlers with a history of specific training for several years, finding that the selected aspects may be influenced by muscle structure, but also specifically and/or simultaneously by training lasting forSeveral years.
Abstract
Various aspects of neuromuscular, anaerobic, and aerobic performance capacity were investigated in four powerlifters, seven bodybuilders, and three wrestlers with a history of specific training for several years. The data (means +/- SD) showed that the three subject groups possessed similar values for maximal isometric force per unit bodyweight (50.7 +/- 9.6, 49.3 +/- 4.1, and 49.3 +/- 10.9 N/kg, respectively). However, significant (P less than 0.05) differences were observed in the times for isometric force production, so that e.g., times to produce a 30% force level were shorter for the wrestlers and bodybuilders (28.3 +/- 3.1 and 26.4 +/- 6.6 ms) than that (53.3 +/- 23.7 ms) for the powerlifters. Utilization of elastic energy by the wrestlers was significantly (P less than 0.05) better than that of the other two subject groups, as judged from differences between the counter-movement and squat jumps at 0, 40, and 100 kg's loads. No differences were observed between the groups in anaerobic power in a 1-min maximal test, but the values for VO2 max were higher (P less than 0.05) among the wrestlers and bodybuilders (57.8 +/- 6.6 and 50.8 +/- 6.8 ml X kg-1 X min-1) as compared to the powerlifters (41.9 +/- 7.2 ml X kg-1 X min-1). Within the limitations of the subject sample, no differences of a statistical significancy were observed between the groups in fibre distribution, fibre areas, or the area ratio of fast (FT) and slow (ST) twitch fibres in vastus lateralis.(ABSTRACT TRUNCATED AT 250 WORDS)

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Endurance and strength training for soccer players: physiological considerations.

TL;DR: New developments in understanding adaptive processes to the circulatory system and endurance performance as well as nerve and muscle adaptations to training and performance have given rise to more effective training interventions.
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The effects of arms and countermovement on vertical jumping.

TL;DR: The results lend insight into which jumping techniques are most appropriate for given sports situations and indicate that a jump test can effectively be used to estimate peak power output.
Journal ArticleDOI

Muscle strength testing: use of normalisation for body size.

Slobodan Jaric
- 01 Jan 2002 - 
TL;DR: Allometric formula for obtaining index of muscle strength, S, independent of body size (assessed by body mass, m) should be recommended in routine strength testing procedures and recommends using body-size-independent indices of both muscle strength and movement performance when assessing functional performance from recorded muscle strength or vice versa.
Journal ArticleDOI

Strength and power assessment. Issues, controversies and challenges.

TL;DR: A frame work is described for the collection of data which may ultimately lead to recommendations for the assessment of strength and power in sporting contexts, which will be evolutionary and depends upon synergistic improvements in understanding of the physiological mechanisms underpinning strength andPower development.
Journal ArticleDOI

Determining variables of plyometric training for improving vertical jump height performance: a meta-analysis.

TL;DR: The responses identified in this analysis are essential and should be considered by strength and conditioning professionals with regard to the most appropriate dose-response trends for optimizing plyometric-induced gains.
References
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Journal ArticleDOI

The assessment of the amount of fat in the human body from measurements of skinfold thickness

TL;DR: A table gives the percentage of the body-weight as fat from the measurement of skin-fold thickness, which was calculated to predict body fat from skinfolds with an error of about ±3.5%.
Journal ArticleDOI

The specificity of the histochemical method for adenosine triphosphatase.

TL;DR: The strong phosphatase activity of endothelium and vascular smooth muscle toward adenosine triphosphate was seemingly indifferent to -SH groups, since the staining of these structures was not markedly influenced by -SH inhibitors or compounds.
Journal ArticleDOI

Enzyme activity and fiber composition in skeletal muscle of untrained and trained men.

TL;DR: Succinate dehydrogenase and phosphofructokinase activities and the histochemical identification of fiber types and localization of oxidative activity were determined on biopsy samples from the vastus lateralis and deltoid muscles of 74 untrained and trained men.
Journal Article

Utilization of stored elastic energy in leg extensor muscles by men and women

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.

Muscle electrolytes in man determined by neutron activation analysis on needle biopsy specimens

J. Bergstrom
TL;DR: Methods are described whereby very small amounts of alkali and other metals may be accurately assayed in minute tissue samples by submitting them to a neutron flux and, after suitable decay periods, measuring certain isotopes so formed.
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