Yazar "Ak, Emre" seçeneğine göre listele
Listeleniyor 1 - 5 / 5
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe The Effect of Fatigue on the Kinematics of Free Throw Shooting in Basketball(ACAD PHYSICAL EDUCATION-KATOWICE, 2010) Uygur, Mehmet; Göktepe, Ayhan; Ak, Emre; Karabörk, Hakan; Korkusuz, FezaFatigue is an indispensible part of a basketball game which may affect an athlete's shooting kinematics. Although kinematic analyses of various sports related movements were extensively done, this study is the first to consider the effects of fatigue on the kinematics of free throw shooting. After measuring the resting heart rate, ten collegiate level, male basketball players (21.8 +/- 1.6 y; 192.8 +/- 3.6 cm; 84.1 +/- 8.5 kg) were asked to perform free throws. Two successful and two unsuccessful free throws were selected. Thereafter, participants were asked to complete the fatigue protocol, which included 30m sprints and 5 vertical jumps at each end, until they reached volitional exhaustion. Additional two successful and two unsuccessful free throws were collected. All shots were recorded by using two digital cameras operating at 60 Hz and placed in a stereoscopic view. The elbow, trunk, knee and ankle joint angles were measured before and after the ball release and at the ball release point. The selected joint angles were compared between successful and unsuccessful free throws, as well as before and after the completion of fatigue protocol. The results demonstrated that fatigue did not effect free throw shooting kinematics (p>0.05) and there was no significant joint angle difference between successful and unsuccessful shots (p>0.05). This study suggested that high level athletes are able to cope with the possible detrimental effects of fatigue while performing coordinated movements such as free throw shooting.Öğe Futbolda penaltı atışının fotogrametrik yöntemler kullanılarak analiz edilmesi(Selçuk Üniversitesi Teknik Bilimler Meslek Yüksekokulu, 2009) Göktepe, Ayhan; Ak, Emre; Karabörk, Hakan; Çiçek, Şeref; Korkusuz, FezaHareketin bilimsel olarak kaydedilmesi ve değerlendirilerek geri dönüş verilmesi sporun vazgeçilmez unsurudur. Sporda hareket analizi günümüzde sadece laboratuar ortamında gerçekleştirilebilmektedir. Bu durumda spora özgün ince farklılıklar ortadan kaybolmakta ve başarıyı beraberinde getiren unsurlarla ilgili sınırlı bilgi edinilebilmektedir. Sporda hareket analizinin doğal ortamda dijital video kameralara kaydedilerek fotogrametrik yöntemlerle değerlendirilmesi gerek ülkemizde gerekse yurt dışında özgün bir fikir olup orijinallik arz etmektedir. Bu çalışmada futbol sporunda penaltı atış hareketinin, digital video kameralarla çekimi gerçekleştirilerek hareket adımlarının analizleri fotogrametrik yöntemler kullanılarak yapılmıştır.Öğe Joint angles during successful and unsuccessful tennis serves kinematics of tennis serve(TURKISH JOINT DISEASES FOUNDATION, 2009) Goktepe, Ayhan; Ak, Emre; Sogut, Mustafa; Karabork, Hakan; Korkusuz, FezaObjectives: The aim of this study was to investigate the joint angle differences in successful and unsuccessful tennis serves of junior tennis players. Patients and methods: Nine healthy junior tennis players (5 girls, 4 boys; mean age 11.8 +/- 0.8 years; height 153.6 +/- 7.2 cm; body mass index 42.3 +/- 4.1 kg; playing experience 6.2 +/- 1.5 years) volunteered to participate in this study. They were asked to perform tennis serves as fast as they can as if they were in an actual game. Successful and unsuccessful serves were recorded using two high speed cameras and then analyzed using Pictran software. Angle changes in pre-impact, impact and post-impact phases were compared. Results: The results of paired sample t-tests revealed nosignificant differences between successful and unsuccessful tennis serves in all three phases. Conclusion: This study failed to show differences between successful and unsuccessful tennis serves in pre-impact, impact and post-impact phases. However, future research with more detailed analyses would be needed to reveal the possible changes in the joints while serving.Öğe Joint Angles During Successful and Unsuccessful Tennis Serves Kinematics of Tennis Serve(2009) Göktepe, Ayhan; Ak, Emre; Söğüt, Mustafa; Karabörk, Hakan; Korkusuz, FezaObjectives: The aim of this study was to investigate the joint angle differences in successful and unsuccessful tennis serves of junior tennis players. Patients and methods: Nine healthy junior tennis players (5 girls, 4 boys; mean age 11.8±0.8 years; height 153.6±7.2 cm; body mass index 42.3±4.1 kg; playing experience 6.2±1.5 years) volunteered to participate in this study. They were asked to perform tennis serves as fast as they can as if they were in an actual game. Successful and unsuccessful serves were recorded using two high speed cameras and then analyzed using Pictran software. Angle changes in pre-impact, impact and postimpact phases were compared. Results: The results of paired sample t-tests revealed nosignificant differences between successful and unsuccessful tennis serves in all three phases. Conclusion: This study failed to show differences between successful and unsuccessful tennis serves in pre-impact, impact and post-impact phases. However, future research with more detailed analyses would be needed to reveal the possible changes in the joints while serving.Öğe Kinematic analysis of penalty kick in soccer(Selçuk Üniversitesi Mühendislik-Mimarlık Fakültesi, 2008) Göktepe, Ayhan; Karabörk, Hakan; Ak, Emre; Çiçek, Şeref; Korkusuz, FezaKinematics of the instep penalty kick to four different targets (50cm2) placed at the upper left (UL), lower left (LL), upper right (UR), and lower right (LR) corners in the goal. Five colligate male soccer players were examined for their knee flexion and ankle extension strategies. The swing, ball contact and follow through phases were analyzed by using a dual camera and Pictran software system. Results revealed that participants had significantly higher ankle extension while hitting the target at the UR (m=77.6 deg, sd=10.5) and LR (m=84.4 degree, sd=10.1) corners. In conclusion players presented similar knee flexion but not ankle extension kinematic strategies at the contact and follow through phases of the instep penalty kick to different corners in the goal.
