Turkish journal of physical medicine and rehabilitation, Mar 1, 2022
Objectives: This study aims to compare ankle force, mobility, flexibility, and plantar pressure d... more Objectives: This study aims to compare ankle force, mobility, flexibility, and plantar pressure distribution of athletes according to foot posture index (FPI). Patients and methods: Between September 2016 and May 2018, a total of 70 volunteer male athletes (mean age: 21.1±2.3 years; range, 18 to 25 years) were included. The athletes were divided into three groups according to their FPI as follows: having supinated feet (Group 1, n=16), neutral/normal feet (Group 2, n=36), or pronated feet (Group 3, n=18). Ankle range of motion (ROM), muscle flexibility, ankle joint strength, and plantar pressure distribution were measured. Results: There were significant differences among the three groups in both right and left ankle dorsiflexion ROM (p=0.009 and p=0.003, respectively). Group 1 had significantly smaller dorsiflexion ROM than the other groups. Group 1 also showed significantly less flexibility in the gastrocnemius and soleus muscles than the other foot posture groups. Groups 2 and 3 exhibited significant differences in the maximum torque (p=0.018), maximum work (p=0.008), and total work (p=0.008) of the right plantar flexor muscles at 60°/sec angular velocity. Peak pressure measurements of the right foot were higher in Group 1, compared to Groups 2 and 3 (p<0.001). Conclusion: The results of this study may help to enhance athletic performance by providing a guide for designing training programs appropriate for athletes with different foot types to address their specific muscle flexibility and strength deficiencies.
Archery is described as a static sport requiring fine motor skill, proper endurance and strength ... more Archery is described as a static sport requiring fine motor skill, proper endurance and strength of the upper body and overall balance ability. The purpose of this study was to identify the effect of the sway of centre of pressure (COP) with eyes open (EO), eyes closed (EC), dominant and non-dominant eyes open during quiet stance in three Archery disciplines. Fifteen archers (Group I: The Recurve Archery (RA): n=5, Group II: Compound Archery (CA): n=5, Group III: Traditional Archery (TA): n=5) participated voluntarily in the study. A 9281EA BioKistler Force Plate system was used to obtain objective measurements for sway of COP in medio-lateral (Ay) and anterio-posterior (Ax) directions during the experimentations. As a result, sway of COP in CA group was smaller than the RA and TA group. Compound archers have better static balance ability than the other groups during quiet stance. Therefore, different archery disciplines, equipment, muscular strategies and skill have some effect on ...
Archery is described as a static sport requiring fine movement control, proper endurance and stre... more Archery is described as a static sport requiring fine movement control, proper endurance and strength of the upper body and balance ability.The purpose of this study was to examine differences in balance abilities during Recurve, Compound and Traditional Turkish Archery. Fourteen archers (Group I: The Recurve Archery (RA): n=5, Group II: Compound Archery (CA): n=4, Group III: Traditional Archery (TA): n=5) participated voluntary in the study. An 9281EA BioKistler Force Plate system was used to obtain objective measurements in medio-lateral (Ay) and anterio-posterior (Ax) directions of the sway of COP during the trials.The RA group displayed a slower COP sway range when compared to the CA and TA groups. The findings of this research suggest that archer drawing weight may affect shooting performance, especially during the releasing phase due to a shift in body weight (COP).
The aim of the study was to evaluate kinematic and muscular activation differences amongst differ... more The aim of the study was to evaluate kinematic and muscular activation differences amongst different age groups of soccer players. Thirty male youth soccer players were divided into 3 groups according to their age (age 12-13; age 14-15; age 16-17). There were significant differences in ball velocities and isokinetic strength values amongst groups. Angular and linear velocities of hip, knee, ankle and toe were also significantly different (p<0.05) amongst groups in different phases. Furthermore, there were significant differences amongst groups regarding EMG activity of m. rectus femoris (RF), m. vastus medialis (VM), m. biceps femoris (BF) (p<0.05). From these results, it was suggested that that the ball velocity of instep kicking increased with age that reflects the development of both muscular strength and coordination of kicking leg.
The present study investigates the various physiological and mechanical techniques employed by ar... more The present study investigates the various physiological and mechanical techniques employed by archers of varying skill levels. A total number of four archers and non-medalist) and two males (expert and novice) participated in the study in two separate experiments. A sum of four shimmer sensors were used to examine, compare and differentiate the postural balance, movement of the bow, digitorum superficial and muscle extensor digitorum as well as the heart rate variability of the archers. The results revealed that elite and medalist archers are better in controlling their postural sway, reducing the movement of their bows, have greater activation of muscle extensors. Both medalist and elite archers maintained a lower heart rate, hence achieved consistency and maximum scores as opposed to the non
Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology, 2017
The purpose of this study was to determine the effects of static whole-body vibration (WBV) on th... more The purpose of this study was to determine the effects of static whole-body vibration (WBV) on the Electromyograhic (EMG) responses of leg muscles, which are fatigue-resistant in different manner. The study population was divided into two groups according to the values obtained by the Fatigue Index [Group I: Less Fatigue Resistant (LFR), n=11; Group II: More Fatigue Resistant (MFR), n=11]. The repeated electromyographic (EMG) activities of four leg muscles were analyzed the following determinants: (1) frequency (30 Hz, 35 Hz and 40 Hz); (2) stance position (static squat position); (3) amplitude (2 mm and 4 mm) and (4) knee flexion angle (120°), (5) vertical vibration platform. Vibration data were analyzed using Minitab 16 (Minitab Ltd, State College, PA, USA). The significance level was set at p<.05. The study results showed that static WBV stimuli given at different frequencies and amplitudes resulted in a significant increase (p<.05) in compared, the LFR group showed signifi...
The aim of the performed study is to present the acute effect of the whole body vibration (WBV) s... more The aim of the performed study is to present the acute effect of the whole body vibration (WBV) stimuli on drop jump (DJ) and postural control performance. 13 athletes who play in Turkish Women Volleyball Second League voluntarily attended to the study (22.3±2.6 age; 60.72kg ±1.74kg; 1.79cm±6.4cm). Athletes were randomly divided into three groups (group 1: n=4: 30Hz; group 2: n=5: 35; group 3: n=4: 40Hz). Before fatigue protocol, every participant's rest center of pressure-sway (CoP-sway) and DJ measurements on force plate were taken. Statistical whole body vibration measurements were practiced on Compex WINPLATE on different frequency (30-35-40Hz), on high amplitude, in the manner that knee flexion angle is 120 0 in 60 seconds. DJ breaking point which is determined for each athlete was applied as DJ jump height after vibration. Just after the fatigue protocol was completed, athletes' CoP-sway measurements after fatigue were practiced on force plate. Different frequency measurements taken to analyse the effects on DJ height of frequency at specific amplitudes were evaluated by ANOVA analysis. Based on variance homogeneity test, the Tukey or Tamhane methods were used for multiple comparisons. A statistical analysis with a paired Student's t test was used to compare pre-vibration and post-vibration treatment values of jumping height at the DJ test. DJ performance is affected by WBV stimuli in different frequency, CoP-sway values and especially fatigue situation in AP direction (p<0.05). In conclusion, 30Hz-35Hz and 40Hz WBV stimuli has an acute effect on DJ performance beside that 35 Hz WBV definitely has the greatest effect.
Olympic archers use different hook techniques like upper and lower two-finger hook. So, the purpo... more Olympic archers use different hook techniques like upper and lower two-finger hook. So, the purpose of this study is to compare three different hook techniques in archery by using kinetic and kinematic methods. A high level archer (FITA scores > 1300) volunteered to participate in this study. The subject engaged in a single test session consisting of 6 shots. Nine forearm and shoulder girdle muscles activation were quantified. The finger hook affected isometric contraction before the snap of the clicker causing sudden contraction of extensors and gradual relaxation of flexor muscles. This finding support earlier finding in the literature. Results showed that three finger hook strategy can be used in the drawing arm with success, as it may avoid causing a lateral deflection of the bowstring.
... Ancak, mini ball üzerinde gerçekleştirilen egzersiz sırasında kaslar her sn de dört kat daha ... more ... Ancak, mini ball üzerinde gerçekleştirilen egzersiz sırasında kaslar her sn de dört kat daha fazla çalışmaktadır. Mini ball egzersizinde görülen en büyük farklılık fleksiyon ve ekstensiyon derecesinde 50 den 90 dereceye artış yönündedir. ...
The purpose of this study was to examine the differences in Ground Reaction Forces (GRF) between ... more The purpose of this study was to examine the differences in Ground Reaction Forces (GRF) between standing and running soccer throw-in. Six male amateur soccer players participated in the current study. All data are expressed as mean±SD. The longer distance was observed in the running throw-in than the standing throw-in. The standing throw-in showed higher values at Vertical (Fz) GRF during back swing, forward swing and release phases. However, that of the running throw-in during follow through phase was higher than that of the standing throw-in. As a result, the longer throwing distance in the running throw-in can be explained that the players spend shorter time in all phases at running throw-in than they did in the standing throw-in. This might causes efficient energy transfer from proximal to distal segment during the running throw-in.
Montenegrin Journal of Sports Science and Medicine, 2021
Dual-tasks are often used with postural control. These tasks, which generally target motor skills... more Dual-tasks are often used with postural control. These tasks, which generally target motor skills and cognitive performance, also help to determine the individual’s postural control. The purpose of this study is to determine the changes in performance during the motor task, which includes the cognitive cues of the hearing-impaired athletes. A total of 31 hearing-impaired athletes (male=19, female=12) and 34 hearing-impaired sedentary people (male=18, female=16) were included voluntarily in the study. The FitLight Trainer™ system was used to determine participants’ reaction time levels. The performance time of hearing-impaired male athletes was significantly lower than the hearing-impaired sedentary men in each of the three tests (Random Test: t = 4, 089, p <0.05; Cue Test: t = 3,551, p <0.05; Mixed Cue Test: t = 2, 393, p<0.05). The performance time of hearing-impaired female athletes was statistically significantly lower than that of sedentary hearing-impaired females for ...
This study investigated the effects of high- and low-frequency acute whole-body vibration (WBV) o... more This study investigated the effects of high- and low-frequency acute whole-body vibration (WBV) on postural control ability. Sixteen male students from the Faculty of Sport Science voluntarily participated in this study. [Methods] WBV stimuli were applied using the following parameters: (1) frequency: 30 or 40 Hz; (2) stance: static squat position; (3) amplitude: 4 mm; (4) knee flexion angle: 120°; and duration: 60 s. The medio-lateral ground reaction force (MLGRF) and anterio-posterior ground reaction force (APGRF) were measured on a force platform. The results showed that static WBV stimulation at 4 mm in amplitude at low and high frequencies resulted in different postural adaptations (p<0.05). The APGRF and MLGRF were higher at 30 Hz than at 40 Hz, and a rapid exponential decline in the post-vibration values was observed within the first 10 seconds of stimulation at 30 Hz or 40 Hz at 4 mm. After the initial 10 seconds, these forces were maintained until the end of the 60-secon...
The athletic function of the foot is also extremely important in soccer and constantly exposed to... more The athletic function of the foot is also extremely important in soccer and constantly exposed to the full impact of weight bearing, because it plays a vital role as a contact point with the ground, absorbing abnormal forces, and main area of the body to kick the ball. The purpose of this study was to compare female soccer players and sedentary individuals in terms of plantar pressure distribution while walking and bilateral standing with barefoot. Eleven female soccer players (21.44±2.12 years, 162.25±5.77 cm, 53.12±6.01 kg, BMI=20.23±1.52 kg/m 2 , Experience=5.98±0.78 years) and 14 sedentary individuals (23.38±5.79 years, 164.92±5.88 cm, 56.31±6.56 kg, BMI=20.67±1.78 kg/m 2 ) participated in this study. Participants performed self-paced walking and 30 seconds bilateral standing on a 1.5-meter walking platform with barefoot. Each footprint was divided into 12 areas as total foot, hindfoot, midfoot, forefoot, 1st metatarsal, 2nd metatarsal, 3rd metatarsal, 4th metatarsal and 5th met...
The purpose of this study was to examine the differences in Ground Reaction Forces (GRF) between ... more The purpose of this study was to examine the differences in Ground Reaction Forces (GRF) between standing and running soccer throw-in. Six male amateur soccer players participated in the current study. All data are expressed as mean±SD. The longer distance was observed in the running throw-in than the standing throw-in. The standing throw-in showed higher values at Vertical (Fz) GRF during back swing, forward swing and release phases. However, that of the running throw-in during follow through phase was higher than that of the standing throw-in. As a result, the longer throwing distance in the running throw-in can be explained that the players spend shorter time in all phases at running throw-in than they did in the standing throw-in. This might causes efficient energy transfer from proximal to distal segment during the running throw-in.
Background and Study Aim. This study investigates expert and amateur basketball players' visu... more Background and Study Aim. This study investigates expert and amateur basketball players' visual tracking strategies accuracy and inaccuracy free throws. Material and Methods. A total of 22 university student, 11 of whom were experts (n = 5 females, n = 6 males) and 11 amateurs (n = 5 females, n = 6 males), without visual impairment, participated the study. Each athlete performed a total of 10 throws. The normal distribution of data recorded in both accurate and inaccurate throws was checked with the Shapiro-Wilk test. All of the data received on accurate and inaccurate throws were analyzed by independent samples t-test. Results. Expert basketball players were recorded to have an average of 78% accurate throws out of 10, and as for amateur basketball players, they were recorded to have 34%. During accurate throws, the quiet eye durations of expert basketball players were identified as ~886ms, and quiet eye durations during inaccurate throws were as ~570ms. During accurate throws,...
A limited number of acute whole body vibration (WBV) studies have investigated the effects of WBV... more A limited number of acute whole body vibration (WBV) studies have investigated the effects of WBV treatments which were applied with different vibration frequencies and amplitude combinations on lower extremity muscle activation of well-trained athletes from different sports branches. To compare the effects of WBV on lower extremity muscle activation via Surface Electromyography (sEMG) of well-trained athletes from different sports branches (soccer, basketball and swimming) during static and dynamic squat exercises. sEMG activities of Tibialis Anterior (TA), Gastrocnemius Medialis (GM), Vastus Medialis (VM), Rectus Femoris (RF), Vastus Lateralis (VL) and Biceps Femoris (BF) muscles of 7 male soccer players, 7 male basketball players, and 6 male swimmers were recorded during WBV applied in static squat and dynamic squat positions with different frequencies (30-35-40 Hz) and amplitude (2-4 mm) combinations separated from each other by 5 min passive rest periods. Each combination was a...
International journal of Science Culture and Sport, 2018
In our study that we aimed to see the differences between footballers' plantar pressure distribut... more In our study that we aimed to see the differences between footballers' plantar pressure distribution and sedentary individuals' in total 31 males [(FG)n=19; age=20.66±1.31 years; body length=178.7±4.64 cm; body weight=75,3±6.1kg), 12 sedentary volunteers (n=12; age= 21.05±2.3 years; body length=177.5±4.8cm; body weight=73.55±8.69 kg)] participated. Right, and left foot dynamic plantar pressures were obtained at 100Hz sample speed with the method of 5 steps dynamic walking. The foot was separated into masks by being divided into 14 different pieces. "MH1: 1. M etatarsal head, MH2: 2. M etatarsal head, M H3: 3. M etatarsal head, M H4: 4. M etatarsal head, M H5: 5. metatarsal head, big toe, 2nd toe, 3rd 4th 5th toes, forefoot, mid foot, hind foot and total foot". Peak p ressure (PP-kPa), maximal force (M F-N), contact area (CA-cm2), contact time (CT-ms) M aximal force normalized to body weight (M FNBW) values were calculated for total foot. Whether there are significant differences between the groups were tested with independent sample t-tests by using SPSS 20.0 software. It is seen that statistically significant differences between football and sedentary groups are in the parameters of M H1 left foot peak pressure (
The aim of this study was to examine attitudes of physical education and sport teacher candidates... more The aim of this study was to examine attitudes of physical education and sport teacher candidates, studying in physical education teaching program and alternative teacher certification program in Turkey, towards teaching profession. The sample of this study consisted of 172 physical education teacher candidates in alternative teacher education certificate training in the Faculty of Education, and 179 physical education teacher candidates are continuing their education in the department of physical education and sports teacher education in four different universities in Turkey. "Attitude Scale towards Teaching" was used as data collection tool in this study. The data were examined by descriptive statistics and a two-way ANOVA test. The teacher education program has the main effect on attitudes toward teaching and teacher candidates in physical education department demonstrated significantly higher attitudes compared to alternative teacher education program p<0.05. There was an interaction effect of the education program and gender on attitudes, p<0.05. It is suggested that revising the time of the education process in alternative teaching programs and subsidize these programs by field experts may lead to better attitude development among physical education teacher candidates in alternative teaching education certificate.
Turkish journal of physical medicine and rehabilitation, Mar 1, 2022
Objectives: This study aims to compare ankle force, mobility, flexibility, and plantar pressure d... more Objectives: This study aims to compare ankle force, mobility, flexibility, and plantar pressure distribution of athletes according to foot posture index (FPI). Patients and methods: Between September 2016 and May 2018, a total of 70 volunteer male athletes (mean age: 21.1±2.3 years; range, 18 to 25 years) were included. The athletes were divided into three groups according to their FPI as follows: having supinated feet (Group 1, n=16), neutral/normal feet (Group 2, n=36), or pronated feet (Group 3, n=18). Ankle range of motion (ROM), muscle flexibility, ankle joint strength, and plantar pressure distribution were measured. Results: There were significant differences among the three groups in both right and left ankle dorsiflexion ROM (p=0.009 and p=0.003, respectively). Group 1 had significantly smaller dorsiflexion ROM than the other groups. Group 1 also showed significantly less flexibility in the gastrocnemius and soleus muscles than the other foot posture groups. Groups 2 and 3 exhibited significant differences in the maximum torque (p=0.018), maximum work (p=0.008), and total work (p=0.008) of the right plantar flexor muscles at 60°/sec angular velocity. Peak pressure measurements of the right foot were higher in Group 1, compared to Groups 2 and 3 (p<0.001). Conclusion: The results of this study may help to enhance athletic performance by providing a guide for designing training programs appropriate for athletes with different foot types to address their specific muscle flexibility and strength deficiencies.
Archery is described as a static sport requiring fine motor skill, proper endurance and strength ... more Archery is described as a static sport requiring fine motor skill, proper endurance and strength of the upper body and overall balance ability. The purpose of this study was to identify the effect of the sway of centre of pressure (COP) with eyes open (EO), eyes closed (EC), dominant and non-dominant eyes open during quiet stance in three Archery disciplines. Fifteen archers (Group I: The Recurve Archery (RA): n=5, Group II: Compound Archery (CA): n=5, Group III: Traditional Archery (TA): n=5) participated voluntarily in the study. A 9281EA BioKistler Force Plate system was used to obtain objective measurements for sway of COP in medio-lateral (Ay) and anterio-posterior (Ax) directions during the experimentations. As a result, sway of COP in CA group was smaller than the RA and TA group. Compound archers have better static balance ability than the other groups during quiet stance. Therefore, different archery disciplines, equipment, muscular strategies and skill have some effect on ...
Archery is described as a static sport requiring fine movement control, proper endurance and stre... more Archery is described as a static sport requiring fine movement control, proper endurance and strength of the upper body and balance ability.The purpose of this study was to examine differences in balance abilities during Recurve, Compound and Traditional Turkish Archery. Fourteen archers (Group I: The Recurve Archery (RA): n=5, Group II: Compound Archery (CA): n=4, Group III: Traditional Archery (TA): n=5) participated voluntary in the study. An 9281EA BioKistler Force Plate system was used to obtain objective measurements in medio-lateral (Ay) and anterio-posterior (Ax) directions of the sway of COP during the trials.The RA group displayed a slower COP sway range when compared to the CA and TA groups. The findings of this research suggest that archer drawing weight may affect shooting performance, especially during the releasing phase due to a shift in body weight (COP).
The aim of the study was to evaluate kinematic and muscular activation differences amongst differ... more The aim of the study was to evaluate kinematic and muscular activation differences amongst different age groups of soccer players. Thirty male youth soccer players were divided into 3 groups according to their age (age 12-13; age 14-15; age 16-17). There were significant differences in ball velocities and isokinetic strength values amongst groups. Angular and linear velocities of hip, knee, ankle and toe were also significantly different (p<0.05) amongst groups in different phases. Furthermore, there were significant differences amongst groups regarding EMG activity of m. rectus femoris (RF), m. vastus medialis (VM), m. biceps femoris (BF) (p<0.05). From these results, it was suggested that that the ball velocity of instep kicking increased with age that reflects the development of both muscular strength and coordination of kicking leg.
The present study investigates the various physiological and mechanical techniques employed by ar... more The present study investigates the various physiological and mechanical techniques employed by archers of varying skill levels. A total number of four archers and non-medalist) and two males (expert and novice) participated in the study in two separate experiments. A sum of four shimmer sensors were used to examine, compare and differentiate the postural balance, movement of the bow, digitorum superficial and muscle extensor digitorum as well as the heart rate variability of the archers. The results revealed that elite and medalist archers are better in controlling their postural sway, reducing the movement of their bows, have greater activation of muscle extensors. Both medalist and elite archers maintained a lower heart rate, hence achieved consistency and maximum scores as opposed to the non
Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology, 2017
The purpose of this study was to determine the effects of static whole-body vibration (WBV) on th... more The purpose of this study was to determine the effects of static whole-body vibration (WBV) on the Electromyograhic (EMG) responses of leg muscles, which are fatigue-resistant in different manner. The study population was divided into two groups according to the values obtained by the Fatigue Index [Group I: Less Fatigue Resistant (LFR), n=11; Group II: More Fatigue Resistant (MFR), n=11]. The repeated electromyographic (EMG) activities of four leg muscles were analyzed the following determinants: (1) frequency (30 Hz, 35 Hz and 40 Hz); (2) stance position (static squat position); (3) amplitude (2 mm and 4 mm) and (4) knee flexion angle (120°), (5) vertical vibration platform. Vibration data were analyzed using Minitab 16 (Minitab Ltd, State College, PA, USA). The significance level was set at p<.05. The study results showed that static WBV stimuli given at different frequencies and amplitudes resulted in a significant increase (p<.05) in compared, the LFR group showed signifi...
The aim of the performed study is to present the acute effect of the whole body vibration (WBV) s... more The aim of the performed study is to present the acute effect of the whole body vibration (WBV) stimuli on drop jump (DJ) and postural control performance. 13 athletes who play in Turkish Women Volleyball Second League voluntarily attended to the study (22.3±2.6 age; 60.72kg ±1.74kg; 1.79cm±6.4cm). Athletes were randomly divided into three groups (group 1: n=4: 30Hz; group 2: n=5: 35; group 3: n=4: 40Hz). Before fatigue protocol, every participant's rest center of pressure-sway (CoP-sway) and DJ measurements on force plate were taken. Statistical whole body vibration measurements were practiced on Compex WINPLATE on different frequency (30-35-40Hz), on high amplitude, in the manner that knee flexion angle is 120 0 in 60 seconds. DJ breaking point which is determined for each athlete was applied as DJ jump height after vibration. Just after the fatigue protocol was completed, athletes' CoP-sway measurements after fatigue were practiced on force plate. Different frequency measurements taken to analyse the effects on DJ height of frequency at specific amplitudes were evaluated by ANOVA analysis. Based on variance homogeneity test, the Tukey or Tamhane methods were used for multiple comparisons. A statistical analysis with a paired Student's t test was used to compare pre-vibration and post-vibration treatment values of jumping height at the DJ test. DJ performance is affected by WBV stimuli in different frequency, CoP-sway values and especially fatigue situation in AP direction (p<0.05). In conclusion, 30Hz-35Hz and 40Hz WBV stimuli has an acute effect on DJ performance beside that 35 Hz WBV definitely has the greatest effect.
Olympic archers use different hook techniques like upper and lower two-finger hook. So, the purpo... more Olympic archers use different hook techniques like upper and lower two-finger hook. So, the purpose of this study is to compare three different hook techniques in archery by using kinetic and kinematic methods. A high level archer (FITA scores > 1300) volunteered to participate in this study. The subject engaged in a single test session consisting of 6 shots. Nine forearm and shoulder girdle muscles activation were quantified. The finger hook affected isometric contraction before the snap of the clicker causing sudden contraction of extensors and gradual relaxation of flexor muscles. This finding support earlier finding in the literature. Results showed that three finger hook strategy can be used in the drawing arm with success, as it may avoid causing a lateral deflection of the bowstring.
... Ancak, mini ball üzerinde gerçekleştirilen egzersiz sırasında kaslar her sn de dört kat daha ... more ... Ancak, mini ball üzerinde gerçekleştirilen egzersiz sırasında kaslar her sn de dört kat daha fazla çalışmaktadır. Mini ball egzersizinde görülen en büyük farklılık fleksiyon ve ekstensiyon derecesinde 50 den 90 dereceye artış yönündedir. ...
The purpose of this study was to examine the differences in Ground Reaction Forces (GRF) between ... more The purpose of this study was to examine the differences in Ground Reaction Forces (GRF) between standing and running soccer throw-in. Six male amateur soccer players participated in the current study. All data are expressed as mean±SD. The longer distance was observed in the running throw-in than the standing throw-in. The standing throw-in showed higher values at Vertical (Fz) GRF during back swing, forward swing and release phases. However, that of the running throw-in during follow through phase was higher than that of the standing throw-in. As a result, the longer throwing distance in the running throw-in can be explained that the players spend shorter time in all phases at running throw-in than they did in the standing throw-in. This might causes efficient energy transfer from proximal to distal segment during the running throw-in.
Montenegrin Journal of Sports Science and Medicine, 2021
Dual-tasks are often used with postural control. These tasks, which generally target motor skills... more Dual-tasks are often used with postural control. These tasks, which generally target motor skills and cognitive performance, also help to determine the individual’s postural control. The purpose of this study is to determine the changes in performance during the motor task, which includes the cognitive cues of the hearing-impaired athletes. A total of 31 hearing-impaired athletes (male=19, female=12) and 34 hearing-impaired sedentary people (male=18, female=16) were included voluntarily in the study. The FitLight Trainer™ system was used to determine participants’ reaction time levels. The performance time of hearing-impaired male athletes was significantly lower than the hearing-impaired sedentary men in each of the three tests (Random Test: t = 4, 089, p <0.05; Cue Test: t = 3,551, p <0.05; Mixed Cue Test: t = 2, 393, p<0.05). The performance time of hearing-impaired female athletes was statistically significantly lower than that of sedentary hearing-impaired females for ...
This study investigated the effects of high- and low-frequency acute whole-body vibration (WBV) o... more This study investigated the effects of high- and low-frequency acute whole-body vibration (WBV) on postural control ability. Sixteen male students from the Faculty of Sport Science voluntarily participated in this study. [Methods] WBV stimuli were applied using the following parameters: (1) frequency: 30 or 40 Hz; (2) stance: static squat position; (3) amplitude: 4 mm; (4) knee flexion angle: 120°; and duration: 60 s. The medio-lateral ground reaction force (MLGRF) and anterio-posterior ground reaction force (APGRF) were measured on a force platform. The results showed that static WBV stimulation at 4 mm in amplitude at low and high frequencies resulted in different postural adaptations (p<0.05). The APGRF and MLGRF were higher at 30 Hz than at 40 Hz, and a rapid exponential decline in the post-vibration values was observed within the first 10 seconds of stimulation at 30 Hz or 40 Hz at 4 mm. After the initial 10 seconds, these forces were maintained until the end of the 60-secon...
The athletic function of the foot is also extremely important in soccer and constantly exposed to... more The athletic function of the foot is also extremely important in soccer and constantly exposed to the full impact of weight bearing, because it plays a vital role as a contact point with the ground, absorbing abnormal forces, and main area of the body to kick the ball. The purpose of this study was to compare female soccer players and sedentary individuals in terms of plantar pressure distribution while walking and bilateral standing with barefoot. Eleven female soccer players (21.44±2.12 years, 162.25±5.77 cm, 53.12±6.01 kg, BMI=20.23±1.52 kg/m 2 , Experience=5.98±0.78 years) and 14 sedentary individuals (23.38±5.79 years, 164.92±5.88 cm, 56.31±6.56 kg, BMI=20.67±1.78 kg/m 2 ) participated in this study. Participants performed self-paced walking and 30 seconds bilateral standing on a 1.5-meter walking platform with barefoot. Each footprint was divided into 12 areas as total foot, hindfoot, midfoot, forefoot, 1st metatarsal, 2nd metatarsal, 3rd metatarsal, 4th metatarsal and 5th met...
The purpose of this study was to examine the differences in Ground Reaction Forces (GRF) between ... more The purpose of this study was to examine the differences in Ground Reaction Forces (GRF) between standing and running soccer throw-in. Six male amateur soccer players participated in the current study. All data are expressed as mean±SD. The longer distance was observed in the running throw-in than the standing throw-in. The standing throw-in showed higher values at Vertical (Fz) GRF during back swing, forward swing and release phases. However, that of the running throw-in during follow through phase was higher than that of the standing throw-in. As a result, the longer throwing distance in the running throw-in can be explained that the players spend shorter time in all phases at running throw-in than they did in the standing throw-in. This might causes efficient energy transfer from proximal to distal segment during the running throw-in.
Background and Study Aim. This study investigates expert and amateur basketball players' visu... more Background and Study Aim. This study investigates expert and amateur basketball players' visual tracking strategies accuracy and inaccuracy free throws. Material and Methods. A total of 22 university student, 11 of whom were experts (n = 5 females, n = 6 males) and 11 amateurs (n = 5 females, n = 6 males), without visual impairment, participated the study. Each athlete performed a total of 10 throws. The normal distribution of data recorded in both accurate and inaccurate throws was checked with the Shapiro-Wilk test. All of the data received on accurate and inaccurate throws were analyzed by independent samples t-test. Results. Expert basketball players were recorded to have an average of 78% accurate throws out of 10, and as for amateur basketball players, they were recorded to have 34%. During accurate throws, the quiet eye durations of expert basketball players were identified as ~886ms, and quiet eye durations during inaccurate throws were as ~570ms. During accurate throws,...
A limited number of acute whole body vibration (WBV) studies have investigated the effects of WBV... more A limited number of acute whole body vibration (WBV) studies have investigated the effects of WBV treatments which were applied with different vibration frequencies and amplitude combinations on lower extremity muscle activation of well-trained athletes from different sports branches. To compare the effects of WBV on lower extremity muscle activation via Surface Electromyography (sEMG) of well-trained athletes from different sports branches (soccer, basketball and swimming) during static and dynamic squat exercises. sEMG activities of Tibialis Anterior (TA), Gastrocnemius Medialis (GM), Vastus Medialis (VM), Rectus Femoris (RF), Vastus Lateralis (VL) and Biceps Femoris (BF) muscles of 7 male soccer players, 7 male basketball players, and 6 male swimmers were recorded during WBV applied in static squat and dynamic squat positions with different frequencies (30-35-40 Hz) and amplitude (2-4 mm) combinations separated from each other by 5 min passive rest periods. Each combination was a...
International journal of Science Culture and Sport, 2018
In our study that we aimed to see the differences between footballers' plantar pressure distribut... more In our study that we aimed to see the differences between footballers' plantar pressure distribution and sedentary individuals' in total 31 males [(FG)n=19; age=20.66±1.31 years; body length=178.7±4.64 cm; body weight=75,3±6.1kg), 12 sedentary volunteers (n=12; age= 21.05±2.3 years; body length=177.5±4.8cm; body weight=73.55±8.69 kg)] participated. Right, and left foot dynamic plantar pressures were obtained at 100Hz sample speed with the method of 5 steps dynamic walking. The foot was separated into masks by being divided into 14 different pieces. "MH1: 1. M etatarsal head, MH2: 2. M etatarsal head, M H3: 3. M etatarsal head, M H4: 4. M etatarsal head, M H5: 5. metatarsal head, big toe, 2nd toe, 3rd 4th 5th toes, forefoot, mid foot, hind foot and total foot". Peak p ressure (PP-kPa), maximal force (M F-N), contact area (CA-cm2), contact time (CT-ms) M aximal force normalized to body weight (M FNBW) values were calculated for total foot. Whether there are significant differences between the groups were tested with independent sample t-tests by using SPSS 20.0 software. It is seen that statistically significant differences between football and sedentary groups are in the parameters of M H1 left foot peak pressure (
The aim of this study was to examine attitudes of physical education and sport teacher candidates... more The aim of this study was to examine attitudes of physical education and sport teacher candidates, studying in physical education teaching program and alternative teacher certification program in Turkey, towards teaching profession. The sample of this study consisted of 172 physical education teacher candidates in alternative teacher education certificate training in the Faculty of Education, and 179 physical education teacher candidates are continuing their education in the department of physical education and sports teacher education in four different universities in Turkey. "Attitude Scale towards Teaching" was used as data collection tool in this study. The data were examined by descriptive statistics and a two-way ANOVA test. The teacher education program has the main effect on attitudes toward teaching and teacher candidates in physical education department demonstrated significantly higher attitudes compared to alternative teacher education program p<0.05. There was an interaction effect of the education program and gender on attitudes, p<0.05. It is suggested that revising the time of the education process in alternative teaching programs and subsidize these programs by field experts may lead to better attitude development among physical education teacher candidates in alternative teaching education certificate.
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Papers by Deniz Şimşek