Sürdürülebilir Kalkınma Amaçları
Yayınlar
- MakaleAçık Erişim2020The examination of Yo-Yo intermittent recovery test performance of young soccer players at different playing positions
Bayrakdaroglu, Serdar; Ari, Erdal; Özkamçi, Huseyin; Can, Ibrahim
Purpose: The aerobic fitness in soccer is an important performance component. The aerobic endurance level of players may positively effect performance of critical match activities. The examination of Yo-Yo intermittent recovery test (YYIRT) performance of young soccer players at different playing positions was aimed in this study. Material: The research group was consisted of 75 young soccer players playing at U-21 category of professional soccer teams at different leagues. The soccer players at 5 different playing positions participated in study voluntarily (centerback: n=15, fullback: midfielder: n=15, winger: n=15, forward: n=15). The YYIRT (level 1) was performed for determination aerobic endurance parameters (covered distance during test, maximum oxygen uptake (VO2max) and maximal aerobic speed (MAS) of players. The one-way ANOVA analysis was used for comparison between playing positions of YYIRT parameters. Results: It was determined that difference between YYIRT parameters of players at different playing positions was non-significant (p>0.05). However, the midfielders covered more distance (2425,33 +/- 440,42 m) than forward (2146,67 +/- 339,64 m), winger (2137,33 +/- 615,18 m), fullback (2056,00 +/- 512,43 m) and centerback (1960,00 +/- 313,51 m) players. The positional requirements of midfielders may be decisive on covered distance during YYIRT. Conclusions: Consequently, it may be said that the young soccer players at different playing positions had similar YYIRT performance and the playing position effect on YYIRT performance could vary depending on league level and individual features of players.
- MakaleYalnız künye2016Load - power relationship in the propulsive phase of full back squat movement
Can, İbrahim; Cihan, Hamit; Ari, Erdal
The purpose of this study was to investigate the load - power relationship during propulsive phase of full back squat (SQ) movement. For this purpose, thirty-two amateur male athletes (age: 20.4± 1.98 years; height: 179.3 ± 7.23 cm; weight: 73.5 ± 9.85 kg) who were actively involved in sports and had strenght at the basic level participated in the study voluntarily.Subjects were asked to perform the one repetition maximal (1RM) strength test and the loads (20, 30, 40, 50, 60, 70, 80, 90 and 100 %) corresponding to different percentages of the 1RM values of were calculated. Finally, subjects performed full back SQ movement for the loads corresponding to different percentages of 1RM and the power properties during propulsive phase was determined as mean power (MP), mean propulsive power (MPP) and peak power (PP). The descriptive statistics, correlation analysis and one-way analysis of variance (ANOVA) for dependent groups were used to evaluate the data. According to results; it was concluded that MP and PP values during propulsive phase of full back SQ movement performed for different loads demonstrate a gradual increase between 20 - 70 % of 1RM and then decreases. On the contrary, it was obtained that MPP values demonstratea gradual increasebetween 20-60 % of 1RM and then decreases. It was concluded that maximal power values for MPP parameter was reached at loads lifted in 60 % of 1RM, while maximal power values for MP (236,3 W) and PP (1382,5 W) parameters were reached at loads lifted in 70 % of 1RM. Also, it was seen that there are low level, positive and statistically a significant relationship between MP (r = ,218; p < 0.05) and PP (r = ,264; p < 0.05) parameters during propulsive phase of full back SQ movement with percentage load values of 1RM, while there is no statistically significant relationship between MPP and percentage load values of 1RM (r = ,107; p > 0.05). As a result; it was concluded that maximal power values during propulsive phase of full back SQ movement applied for different loads were reached during lifting performed in the middle loads and concluded that the most powerful relationship between load - power was obtained with PP parameter although it was low.
- MakaleYalnız künye2014The investigation of relationships among sprint and jump performance with velocity parameters during propulsive phase of full back squat exercise
Can, İbrahim; Cihan, Hamit; Ari, Erdal
The basic purpose of this study was to investigate of the relationships with sprint and jump performance of velocity parameters during propulsive phase of full back squat exercise and to determine which variable was associated with which loading loading. For this purpose, thirty-two men amateur athletes (age: 20.4 ± 1.98 years; height: 179.3 ± 7.23 cm; weight: 73.5 ± 9.85 kg) who actively involved in sports and have a basic level of force participated in voluntarily to this study. In the study, one repetition maximum (1RM) full squat (SQ) strength test, vertical jump test, 5 meters and 30 meters sprint test were applied. The descriptive statistics and Pearson correlation analysis was used for statistical evaluation of datas. According to analysis results; it was obtained that mean velocity (MV), mean propulsive velocity (MPV) and peak velocity (PV) values during propulsive phase of full back squat exercise performed in different loads were decreased in parallel with load increase. In addition, it was obtained that there was no statistically a significant relationships between 5 meters sprint times and vertical jump performance with MV, MPV and PV values during propulsive phase of full back SQ exercise performed at different loads of 1RM (p > 0.05). Conversely, it was obtained that there was a mean level, negative and statistically significant relationship between 30 meters sprint times with MV during propulsive phase of full back SQ movement performed at 20 % and % 90 of 1RM load values (r = - .412; r = - .399, p < 0.05, respectively) and PV values obtained at 40 % and 60 % of 1RM load values (r = - .402; r = - .370, p < 0.05, respectively). Consequently, it was suggested that movement velocity is not an important component for performance parameters as 5 meter sprint and jumping height.
- MakaleYalnız künye2012The Effect of Maximal Leg Press Strength Training on Bilateral Deficit
Can, İbrahim; Kale, Rasim; Cihan, Hamit; Ari, Erdal
The purpose of this study was to determine maximal isometric strength with bilateral and unilateral muscle contractions and investigate maximal strength training whether or not influenced on this bilateral deficit. For this reason, 34 amateur soccer player (age = 17 ± 2.51 years) were divided into three groups as bilateral training group (n=14), unilateral training group (n=10) and control group (n=10). The unilateral training group performed maximal leg press exercise using each leg unilaterally. The bilateral leg training group was performed to leg press exercise using simultaneously bilateral legs. The control group wasn't trained. The groups in training continued these resistance exercises as 1 hour a day, 3 days a week, for 12 weeks. The improvement in strength brought by training was compared as bilateral training group and unilateral training group. Bilateral deficit also was calculated between two groups. The strength in the trained limbs during training was measured in 4th weak (after four weeks) and 12th weak (after twelve weeks). It was determined that maximal isometric strength of two training groups was increased significantly by strength trainings (p<0.05). There wasn't any significant difference at strength increase for first four weeks of training period (p>0.05). It was determined that strength was increased significantly for final weeks of training period (p<0.05). The other important consequence of this study was determined that maximal strength training had significant effect on bilateral deficit (p<0.05). As a consequence of this study, maximal strength trainings which involved bilateral muscle contractions were effective for reducing of bilateral deficit.