title: Joint angles during successful and unsuccessful tennis serves kinematics of tennis serve.
abstract: OBJECTIVE
  The aim of this study was to investigate the joint angle differences in successful and unsuccessful tennis serves of junior tennis players.
  
  
  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.
  
  
  CONCLUSIONS
  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.
authors: Department of Geodesy and Photogrammetry, Selçuk University, Technical Science College, Konya, Turkey. agoktepe@selcuk.edu.tr
authors: Ayhan
authors: A
authors: Göktepe
authors: Emre
authors: E
authors: Ak
authors: Mustafa
authors: M
authors: Söğüt
authors: Hakan
authors: H
authors: Karabörk
authors: Feza
authors: F
authors: Korkusuz
mesh_terms: D001265:Athletic Injuries / Q000503:physiopathology*; D001696:Biomechanical Phenomena; D002648:Child; D004551:Elbow Joint / Q000502:physiology / Q000503:physiopathology; D005260:Female; D006801:Humans; D008297:Male; D013715:Tennis / Q000293:injuries*; D013716:Tennis Elbow