The purpose of this study was to investigate the effect of tennis training on balance and hand-eye coordination. We also tried to determine the speed difference of coordination evolution in people who had not previously played ball sports compared with people who had. There were two groups on our research. The first group consisted of 17 male university students who had already played a ball sport aged 22,11 ± 0,98 year. We chose the subjects by searching for athletes who had trained for a sport branch other than tennis at least 3 days a week for more than 2 years. The second group consisted of 15 male university students who had not previously played a ball sport aged 20,46 ± 1,60 year. We gave each subject eight weeks of tennis training, twice a week, 2 hours per day. No special formative practices concerning balance or coordination were given to the subjects. The subjects were tested with the Flamingo Balance Test, Hand eye coordination test and Tennis Ability Test. The tests were carried out at the beginning (4 th hour), the middle (16 th hour) and the end of our study (36 th hour). By statistical analysis of the results of the tests, we can say that for Flamingo Balance Test, recessive hand-eye coordination test and Tennis Ability Test there was a significant difference between the first evaluation and the third evaluation for both groups (p<0,05). Moreover, learning acceleration between 1 st and 2 nd (p<0,05) evaluation were greater than 2 nd and 3 rd one (p>0,05). This result supports 2 nd purpose of the study. Accordingly, their learning improvement was slowdown in Recessive Hand-eye Coordination and Tennis Ability Tests both of groups.

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Study aim: The purpose of this study was to evaluate the acute effect of different four caffeine mouth rinse intervention (caffeinated coffee, decaffeinated coffee, placebo, control) on attention and hand-eye coordination. Material and methods: Sixty-five healthy, recreationally active female (n = 41) (age 22.89 ± 3.94 years; body mass index 20.87 ± 2.63 kg/m2) and male (n = 24) (age 29.91 ± 12.06 years; body mass index 22.56 ± 2.21 kg/m2) volunteered to participate in this randomized, single-blind, placebo-controlled, crossover study. The Stroop Color-Word Test (SCWT) and Mirror-Tracing Test (MTT) was used. Participants first completed a SCWT or MTT, then rinsed and expectorated 25 ml of caffeinated coffee (containing 0.13% caffeine) or decaffeinated coffee or placebo (water) or control that did not rinse for 10 s, followed by SCWT or MTT again. Data were analyzed using a 4 (mouth rinse interventions) × 2 (pre-test and post-test) repeated measures ANOVA. Results: SCWT time, MTT draw time and MTT number of error measures were not significantly different between four mouth rinse interventions (p > 0.05). Conclusions: Caffeinated coffee or decaffeinated coffee mouth rinse for 10 s provided immediately prior to SCWT or MTT did not affect attention and hand-eye coordination.