A lot of evidences suggest that heavy internet use impacts negatively with health, when the use is almost ubiquitous among adolescents The purpose of the study was to investigate the association between exercise and physical activity with internet use and other basic sociodemographics factors. In the study involved 136 boys and 108 girls, aged 13–15 years old. For the purpose of the survey it was administered a questionnaire. For statistical analyses one way ANOVA and factor analysis was used to explore the variables. Results revealed that there were significant effects of exercise and physical activity on “reduction of stay online” F (2,239)=4,21, p=0, 041. There was a significant effect of gender on “negative feelings because of non-internet access” F (1,239)=10,93, p=0,001 and on “reduction of stay on the internet” F (1,239)=10,93, p=0,001. In conclusion, the use of the internet was found to have a negative relationship with exercise, physical activity, health and school performance between teenagers who took part in the survey.

Sport and Physical Education is an interesting activity for the development of the disabled children and their class integration (Borioli & Laub, 2007; Avramidis, Bayliss& Burden, 2000).Today, the objective in school is to provide equal opportunities for pupils (Boudon, 1973). Indeed, to allow an integration of the pupils with particular needs in an ordinary class, it seems important for the institution to adhere to value of equal opportunity (Peltier, 1997; Columna & al, 2010; Dubois, 2011). Tunisia is also engaged in the development and the implementation of a true national strategy for the integration of children with special needs into ordinary classes in Sport and Physical Education (law n° 2005-83 of 15 August 2005). Two hundred teachers randomly selected participated in our experiment. They all reside in the region of Sfax (Tunisia) working at the primary, preparatory and secondary schools (X_=35.5 years; Standard deviation=4.41). They answered the questionnaire anonymously (Dubois, 2011). According to our results, we noted that teachers of Sport and Physical Education present diffi culties to deal with the totality and diversity within the school (Ludovic, 2000).

The purpose of this study was to know the level of self-efficacy, to investigate self-efficacy, achievement motivation of football players in different playing position and to reach of finding the relationship between self-efficacy and achievement motivation of football players. The sample consisted of male amateur football players (N =61) between the age 16 and 19 years. General self-efficacy scale-Schwarzer (GSES), task and ego orientation in sport questionnaire (TEOSQ) were used to collection data. Descriptive statistics, kruskal-wallis Test and spearman’s correlation analysis were used to calculate data. The results indicated that there was high self-efficacy among football players. No statistically significant difference in football players’ self-efficacies and achievement motivations according to their playing position. And there was positive and significant correlation between self-efficacy and task orientation and between self-efficacy and self-confidence.

When we look at the great achievements at each source of developing sport levels all over the world, we will realize that sport training has a great position in developing human abilities, discover their latent powers and transform them to great achievements that will last for eternity along history. Countries around the world are interested in developing various sports and at all levels. This is clear in Olympic and world championships in terms of raising performance and record levels. This is also evidence on high ability to employ scientific facts and theories to serve sport development. Lately, a set of critical speed exercises were introduced as they express speed related to performance with a special rule that may become an evidence on the use of times of training intensities and determine these intensities based on the output time period of this training. Therefore, the researcher decided to use a new training method to develop speed using new training methods to reach critical speed using target time, develop time, reaching achievement at the least possible time in performance as well as knowing the player’s bio-kinematic movement. This means to analyze the performance of the player to be able to know the variables that are involved in performance and reach world achievement.The study aims to prepare exercises based on critical speed and define their effect on developing running strides (length and frequency) in the 100 m dash achievement for both groups of the study. The researcher proposed that there are statistically significant differences between pre- and post-tests for both groups of the study in variables under study. The empirical method was used by the design of two empirical groups. The sample of the study included 12 young players of 100 m dash races from the specialist care center for talents. Sample homogeneity was performed for members of the sample. After that, the researcher divided the sample into two groups randomly through polls. Each group included six players. The first empirical group applied critical speed exercises, while the second one applied speed training. Step length, stride frequency, achievement of 100 m dash within the Kinovea analysis for all variables of the study. The method was applied on (8) weeks in three training units per week with total 24 units. Items of the methodology were determined for both empirical groups in distances, repetitions, sets and rest periods. As for the difference in both groups, the first one calculates the times of distance performance and\r\ncritical speed and found that critical speed exercises achieved a development in the length, frequency and achievement of 100 m dash better than the group of speed exercise s. the researcher recommends adopting special exercises according to critical speed time period in athletic training on 100 m dash event and for the youth, especially in the specialist center for talents.

The purpose of the present study was to examine the acute effect of Whole-Body-Vibration (WBV) on rhythmic gymnasts’ static and dynamic balance. It was hypothesized that vibration exposure induces positive short-term effect on postural control, enhancing the ankle strategy. This hypothesis was tested on eleven elite rhythmic gymnasts, who were examined twice, once with WBV and once without WBV (NWBV). Balance was assessed under six different conditions with the Sensory Organization Test (SOT) based on the EquiTest Dynamic Posturography system. All tests were performed at baseline, immediately after and 15 minutes after the end of the intervention. The results showed that the improvement of the gymnasts’ postural control was significantly greater after the WBV as\r\ncompared to the NWBV protocol in all examined parameters. Therefore, WBV may be an effective warm-up method for the enhancement of the ankle strategy during performance.

The main aim of this research is to evaluate the prevalence of job burnout among a Tunisian administrative population. Burnout is a work- related syndrome which results from person’s perception of a distress between the efforts made and the rewards that it receives (Friedman, 1995).In this regard, multiple studies, that address the topic of the worker’s mental health, show that employees suffer more and more from exhaustion in their work (Lindblom& al, 2006; Beer, 2001; Alarcon, 2011). Thus, burnout plays a significant part in to increasing dissatisfaction (Wolpjn & al, 1991) and decreases engagement (Richardsen & al, 1992; 1993). To evaluate the level of job\r\nburnout we used Maslach and Jackson’s questionnaire (1986) on a population composed of 208 civil servants of the Ministry of youth, sports, women and family in Tunisia. The data analysis of this research shows that the civil servants are suffering from a latent burnout. Our results also indicate that there is a significant difference between exhaustion of the administrative staff and gender. However, there is no group effect between seniority and burnout. Therefore, the burnout prevention must obviously among the prerogatives of\r\nthe health public policy in Tunisia.

The study was designed to assess the effects plyometric training program on the explosive strength development of students in the second level at the College of Sport and Physical Education of Anbar in Iraq. 2 groups (experimental group [EG: 16 Students] and control group [CG: 14 Students) were selected to participate in this study along Eight weeks with 3 training’s sessions a week. Our results showed an important amelioration of the post tests among the two groups compared to the pre tests, also in favour of the first group which have a plyometric training in both tests the Squat Jump and the Medicine ball throw.