101. Functional and neuromuscular changes in the hamstrings after drop jumps and leg curlsNejc Šarabon, Andrej Panjan, Jernej Rošker, Borut Fonda, 2013, original scientific article Keywords: isometric strength, stamping, balance, kinaesthesia, DOMS, EIMD
Published in RUP: 15.10.2013; Views: 4745; Downloads: 71
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102. FES training in agingHelmut Kern, Stefan Loefler, Christian Hofer, Michael Vogelauer, Samantha Burggraf, Martina Grim-Stieger, Jan Cvecka, Dušan Hamar, Nejc Šarabon, Feliciano Protasi, Antonio Musarň, Marco Sandri, Katia Rossini, Ugo Carraro, Sandra Zampieri, 2012, original scientific article Keywords: FES, exercise training, aging, functional analyses, mobility, muscle fiber size
Published in RUP: 15.10.2013; Views: 3725; Downloads: 71
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105. Secular trends in body dimensions among young tennis players from 1992 to 2008Aleš Filipčič, Bojan Leskošek, Nejc Šarabon, Tjaša Filipčič, 2012, original scientific article Abstract: Several studies have examined both physical characteristics and fitness of children and youth. The aim of the study was first, to find the tendency of changes in selected morphological characteristics of young male and female tennis players of various ages in the periods 1992-2000-2008; and second, to find the changes in selected variables of young tennis players and to compare them with the results of boys and girls of same age from normal school population. Sample of variables included body height, body weight and body mass index (BMI). Multivariate analysis of variance revealed statistically significant differences in all main factors (group, age, gender and period) and additionally in interactions group*period, group*gender and age*gender. Univariate analysis of variance revealed statistically significant differences in body height and BMI between the groups of tennis players and the same age school population for both sexes and between three age groups (12-13 years, 14-15 years, 16-17 years) for body height, body weight and BMI. Differences between the sexes indicate statistically significant differences only in variables body height and weight. Changes in the observed morphological characteristics point to the increase in body height, body weight and BMI values in both school population and young tennis players
Keywords: tennis, young players, body weight, body hight, BMI, secular trends
Published in RUP: 15.10.2013; Views: 3381; Downloads: 236
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108. Strength training in elderly people improves static balanceNejc Šarabon, Stefan Loefler, Jan Cvecka, Milan Sedliak, Helmut Kern, 2013, original scientific article Abstract: Aim of this study was to investigate the effects of two different types of strength training programs on static balance in elderly subjects. Subjects older than 65 years of age were enrolled and assigned to control group (CG, n =19), electrical stimulation group (ES, n = 27) or leg press group (LP, n = 28). Subjects in both the training groups were exposed to training (2-3x/week) for a period of 9 weeks. In the ES group the subjects received neuromuscular electrical stimulation of the anterior thigh muscles. In the LP group the subjects performed strength training on a computer-controlled leg press machine. Before and after the training period, static balance of the subject was tested using a quiet stance task. Average velocity, amplitude and frequency of the center-of-pressure (CoP) were calculated from the acquired force plate signal. The data was statistically tested with analysis of (co)variance and t-tests. The three groups of subjects showed statistically significant differences (p < 0.05) regarding the pre-training vs. post-training changes in CoP velocity, amplitude and frequency. The differences were more pronounced for CoP velocity and amplitude, while they were less evident in case of mean frequency. The mean improvements were higher in the LP group than in the ES group. Our results provide supportive evidence to the existence of the strength-balance relationship. Additionally, results indicate the role of recruiting central processes and activation of functional kinetic chains for the better end effect
Keywords: balance, aging, falls, strength, training
Published in RUP: 15.10.2013; Views: 3330; Downloads: 237
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110. The effect of vision elimination during quiet stance tasks with different feet positionsNejc Šarabon, Jernej Rošker, Stefan Loefler, Helmut Kern, 2013, original scientific article Abstract: Literature confirms the effects of vision and stance on body sway and indicates possible interactions between the two. However, no attempts have been made to systematically compare the effect of vision on the different types of stance which are frequently used in clinical and research practice. The biomechanical changes that occur after changing shape and size of the support surface suggest possible sensory re-weighting might take place. The purpose of this study was to assess the effect of vision on body sway in relation to different stance configurations and width. Thirty-eight volunteers performed four quiet stance configurations (parallel, semi-tandem, tandem and single leg), repeating them with open and closed eyes. Traditional parameters, recurrence quantification analysis and sample entropy were analyzed from the CoP trajectory signal. Traditional and recurrence quantification analysis parameters were affected by vision removal and stance type. Exceptions were frequency of oscillation, entropy and trapping time. The most prominent effect of vision elimination on traditional parameters was observed for narrower stances. A significant interaction effect between vision removal and stance type was present for most of the parameters observed (p < 0.05). The interaction effect between medio-lateral and antero-posterior traditional parameters differed in linearity between stances. The results confirm the effect of vision removal on the body sway. However, for the medio-lateral traditional parameters, the effects did not increase linearly with the change in width and stance type. This suggests that removal of vision could be more effectively compensated by other sensory systems in semi-tandem stance, tandem and single legged stance
Keywords: balance, Body sway, Sensory manipulation, vision
Published in RUP: 15.10.2013; Views: 3511; Downloads: 146
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