Abstract70 soccer players in Gaziantep amateur league voluntarily participated in this study, (average of their ages 19,17±1,34years, average of their heights 181,28±5,06 cm, average of their body weights 76,75±4,43 kg and average of their sports experiences 3,78±0,95 years) to analyze visual and auditory reaction times and aerobic capacities of amateur soccer players according to their playing positions. The reaction times against light and sound of right and left hands were measured by 'Newtest Reaction Timer.' The aerobic capacity measurements of players in this study were determined by shuttle sprint test. In comparison of left and right hand reaction times, it was statistically found that goalkeepers had the best reaction times and midfielders had better reaction times than forwards and defenders (P<0,05). In comparison of aerobic capacities of their playing positions, it was found that MaxVO2 levels of goalkeepers were lower than that of midfielders and forwards (P<0.05). In conclusion, it was found that the factors such as MaxVO2 level and reaction time which affect the performances of players nowadays and differ according to their playing positions. It is considered that these differences result from the different training programs according to the playing positions.

The aim of study was to examine relationship between balance and aerobic capacity in adolescent athletes. Total fifty athletes that is twenty five female and twenty five male participated as volunteer. Male athletes (age means; 17.12±0.83 years, height means; 172.28±7.66 cm, body weight means; 64.96±9.21 kg). Female athletes (age means; 16.80±0.82 years, height means; 162.36±6.24 cm, body weight means; 53.76±5.88 kg). Athletes completed the 20-meter shuttle run test for aerobic capacity and flamingo balance test for balance. In generally, we found a significant relationship between balance and aerobic capacity (P<0.05). We didn't found a significant relationship between balance and aerobic capacity for female athletes (P>0.05). Also, we didn't found a significant relationship between balance and aerobic capacity for male athletes (P>0.05). In conclusion, it was considered that due to gender differences in the relationship between balance and aerobic capacity. However, it was said that no differences between Athletes (female and male as separate) with the same physical characteristics.

The aim of this study was to identify the effects of speed training over the agility, quickness and acceleration for young basketball players. A total of 26 young basketball players (mean ± SD; age: 15,35 ± 0,49 years) volunteered to participate (speed training group (STG; n = 13) and control group (CG; n = 13). We applied the agility (T test), quickness (5 m speed), and acceleration (10 m and 15 m speed). Our results shown that there is significant differences in pre and post training for agility, quickness, acceleration (10 m ) in STG and CG but 15 m acceleration is insignificant in STG. There is insignificant differences in pre and post training acceleration (15 m) in STG and CG. Consequently, the speed training method can be implemented during group sessions in a structured fashion, allowing coaches to optimize the time spent on such physical conditioning activities.

Agility and acceleration are known as high speed actions and impact soccer performance. Soccer players need MaxVO2 and standing long-jump to make high - speed actions during soccer match. The purpose of this study was to examine the prediction of the effect of acceleration on agility, endurance, long jump and 30 m-speed. Total 21 amateur male soccer players (mean ± SD: age = 20.29±1.82 yr, height = 1.81±0.37 m, and body weight = 72.10±3.71 kg) volunteered to participate in the study. Acceleration performance (10 m), sprint (30 m), agility (zigzag test), endurance (Yo-Yo intermittent recovery test 1), and jumping ability (standing long jump) were tested. Acceleration predicts MaxVO2 by 19.8 %, agility by 49.9 %, and 30 m-speed by 32.9 %. On the other hand, there is not relationship between acceleration and standing long jump. If we consider that there is a decrease in agility and subsequent increase in football players' sudden change of direction, we see that acceleration explains the decrease and increase in agility rate at the best level. It is thought that acceleration does not affect the long jump by stopping, as footballers are exposed to vertical jump rather than horizontal jump. To improve agility and speed performance, football coaches can design combined acceleration based training.