Home Jurnale medicale Journal of Human Kinetics
Jurnale medicale
Journal of Human Kinetics
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Jurnale medicale Journal of Human Kinetics

4 Iulie 2012 06:05

The aim of the present study was to evaluate the use MRI to quantify the workload of gluteus medius (GM), vastus medialis (VM) and vastus lateralis (VL) muscles in different types of squat exercises. Fourteen female volunteers were evaluated, average age of 22 ? 2 years, sedentary, without clinical

mai mult
Journal of Human Kinetics
4 Iulie 2012 06:05

The kinematic profiles of the hip and center of mass in front crawl swimming were compared to quantify the error of using a fixed body point to assess intracyclic velocity variations at moderate intensity exercise. The practical goal was to provide a useful tool, easy and fast to assess, and to use

mai mult
Journal of Human Kinetics
4 Iulie 2012 06:05

This study aimed to examine the gender differences in postural stability among 8-12 year-old children. Twenty-six children participated in this repeated measures study to measure the centre of pressure (COP) under one normal condition (CONTROL: hard surface, eyes open, and looking straight ahead) an

mai mult
Journal of Human Kinetics
4 Iulie 2012 06:05

In gymnastics, most skills incorporate rotations about one or more body axes. At present, the question remains open if factors such as lateral preference and/or vestibulo-spinal asymmetry are related to gymnast's rotational preference. Therefore, we sought to explore relationships in gymnast's rotat

mai mult
Journal of Human Kinetics
4 Iulie 2012 06:05

The main objective of this study was to analyze the motor variability in the performance of the tennis serve and its relationship to performance outcome. Seventeen male tennis players took part in the research, and they performed 20 serves. Linear and non-linear variability during the hand movement

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Journal of Human Kinetics
4 Iulie 2012 06:05

The aim of this study was to analyze the effects of depth on drag during the streamlined glide in swimming using Computational Fluid Dynamics. The Computation Fluid Dynamic analysis consisted of using a three-dimensional mesh of cells that simulates the flow around the considered domain. We used the

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Journal of Human Kinetics
4 Iulie 2012 06:05

One of the key components in sports injury prevention is the identification of imbalances in leg muscle strength. However, different leg muscle characteristics may occur in large playing area (field) sports and small playing area (court) sports, which should be considered in regular injury preventio

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Journal of Human Kinetics
4 Iulie 2012 06:05

The objective of the present study was to determine the effects of exercise continued until the anaerobic threshold on balance performance in basketball players. Twelve male basketball players (age = 20.92 ? 2.81 years, body height = 192.72 ? 7.61 cm, body mass = 88.09 ? 8.41 kg, training experie

mai mult
Journal of Human Kinetics
4 Iulie 2012 06:05

Our previous study showed a significant relationships between static exercise-induced changes in plasma adrenomedullin (ADM) and those in endothelin-1 (ET-1), noradrenaline (NA) and pre-ejection period/left ventricular ejection time ratio (PEP/LVET) in older healthy men. It is hypothesized that ADM,

mai mult
Journal of Human Kinetics
4 Iulie 2012 06:05

Muscle strength and fatigue resistance increases with resistance training. Resistance training adaptations can be enhanced with single-ingredient or dual-ingredient supplementation but less is known about resistance training adaptations by multi-ingredient supplementation. We examined the effects of

mai mult
Journal of Human Kinetics
4 Iulie 2012 06:05

Over the last years there has been a substantial growth in research related to specific training methods in soccer with a strong emphasis on the effects of small-sided games. The increase of research in this topic is coincident with the increase of popularity obtained by specific soccer conditioning

mai mult
Journal of Human Kinetics
4 Iulie 2012 06:05

The purpose of this study was to check the validity and the intra- and inter-evaluators reproducibility of the Sargent Jump Test, as an instrument of explosive strength measurement of soccer players of the sub-15 class. Forty-five soccer players were randomly selected from different clubs competing

mai mult
Journal of Human Kinetics
4 Iulie 2012 06:05

Rhythm training is an integral part of sports. The purposes of the study were to analyze the effects of rhythm training on tennis performance and rhytmic competence of tennis players, to compare the improvement levels of tennis specific and general rhythm training and to examine the effects of short

mai mult
Journal of Human Kinetics
4 Iulie 2012 06:05

The purpose of this study was to evaluate the effectiveness of short-term stability ball (SB) training on males and females by comparing the strength changes produced in the core muscles. Forty-two previously untrained subjects, mean age = 23.62 ? 2.89 years were matched by their maximum strength (

mai mult
Journal of Human Kinetics
4 Iulie 2012 06:05

The purpose of this study was both to develop a novel test to measure run, shuttle run and directional change agility, and soccer shots on goal with decision making and to compare it with other agility tests. Multiple comparisons and assessments were conducted, including test-retest, Illinois, Zig-Z

mai mult
Journal of Human Kinetics
4 Iulie 2012 06:05

This study investigated gender, age group and locality differences in adolescent athletes' self-determination motivation and goal orientations in track and field. It also examined the relationship between the self-determination theory and achievement goal theory. A total of 632 (349 boys, 283 girls)

mai mult
Journal of Human Kinetics
4 Iulie 2012 06:05

While theory and practice of sport have much to say about fear, stress and anxiety, they have little to say about courage. Therefore, the purpose of this study was to develop a Sport Courage Scale. Data were collected from two groups of male and female athletes aged from 13 to 22 in different indivi

mai mult
Journal of Human Kinetics
4 Iulie 2012 06:05

Goal setting difficulty has been shown to contribute to athletic performance (Burton et al., 2000). However, the potential mediating mechanism of goal difficulty on performance is unclear. Therefore, the purpose of this study was to verify the effect of goal setting difficulty on serving success in

mai mult
Journal of Human Kinetics
4 Iulie 2012 06:05

This study examines the relationship between psychophysiological arousal, cognitive anxiety, and personality traits in young taekwondo athletes. A total of 20 male and 10 female taekwondo athletes (mean age = 18.6 years; ? 1.8) volunteered for the study. The Five Factor Personality Inventory and th

mai mult
Journal of Human Kinetics
30 Mai 2012 08:22

One purpose of evaluating a swimmer is to establish the individualized optimal technique. A swimmer's particular body structure and the resulting movement pattern will cause the surrounding water to react in differing ways. Consequently, an assessment method based on flow visualization was developed

mai mult
Journal of Human Kinetics
30 Mai 2012 08:22

Swimming and Aquatic Activities: State of the Art

  • Content Type Journal Article
  • Category review
  • Pages 5-7
  • DOI 10.2478/v10078-012-0018-4
  • Authors
    • Yolanda Escalante, Facultad de Ciencias del Deporte. AFIDES Research Group, Universidad de Extremadura, Spain
    • Jose M. Saavedra, Facultad de Ciencias del Deport
mai mult
Journal of Human Kinetics
30 Mai 2012 08:22

The aim of this research was to develop a path-flow analysis model to highlight the relationships between buoyancy and prone gliding tests and some selected anthropometrical and biomechanical variables. Thirty-eight young male swimmers (12.97 ? 1.05 years old) with several competitive levels were e

mai mult
Journal of Human Kinetics
30 Mai 2012 08:22

The aim of this work was to study the impact of the implementation of a mental training program on swimmers' chronometric performance, with national and international Portuguese swimmers, based on the goal setting model proposed by Vasconcelos-Raposo (2001). This longitudinal study comprised a sampl

mai mult
Journal of Human Kinetics
30 Mai 2012 08:22

The aim of this study was to determine the differences in the kinematic parameters between the grab and track starts and the differences in these two starts between genders. A total of 27 swimmers at the competitive level participated in the study, 13 boys (mean ? SD: age 15.8 ? 0.8 years, body ma

mai mult
Journal of Human Kinetics
30 Mai 2012 08:22

The aim of this study was to analyse to what extent the use of different loads modifies freestyle stroke and coordination parameters during semi-tethered swimming, and to examine whether those changes are positive or negative to swimming performance. First, behaviour of swimming speed (v), stroke ra

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Journal of Human Kinetics
30 Mai 2012 08:22

The aim of this study was to compute and validate trunk transverse surface area (TTSA) estimation equations to be used assessing the swimmer's drag force according to competitive level by gender. One group of 130 swimmers (54 females and 76 males) was used to compute the TTSA estimation equations an

mai mult
Journal of Human Kinetics
30 Mai 2012 08:22

The aim of the study was to evaluate the effects of the dry-land power training on swimming force, swimming performance and strength in youth swimmers. Twenty six male swimmers, free from injuries and training regularly at least 6 times a week, were enrolled in the study and randomly assigned to one

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Journal of Human Kinetics
30 Mai 2012 08:22

While there is a direct relationship between maximal anaerobic power (Pmax) and swimming performance, the relationship between upper and lower limbs with regard to Pmax and force-velocity (F-v) characteristics is not clear. The aim of the present study was to examine the effect of age and sex on the

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Journal of Human Kinetics
30 Mai 2012 08:22

This paper analyses the dynamics of changes between the performances of elite freestyle swimmers recorded at particular Olympic Games. It also uses a set of chronologically ordered results to predict probable times of swimmers at the 2012 Olympic Games in London. The analysis of past performances of

mai mult
Journal of Human Kinetics
30 Mai 2012 08:22

The swimming involves accelerations and decelerations in the swimmer's body. Thus, the main objective of this study is to make a temporal and frequency analysis of the acceleration in front crawl swimming, regarding the gender and the performance. The sample was composed by 31 male swimmers (15 of h

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Journal of Human Kinetics
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