• Publications
  • Influence
Effects of small-sided games on physical conditioning and performance in young soccer players.
  • A. Katis, E. Kellis
  • Psychology, Medicine
  • Journal of sports science & medicine
  • 1 September 2009
The purpose of this study was to examine, first, the movement actions performed during two different small-sided games and, second, their effects on a series of field endurance and technical tests.Expand
  • 203
  • 31
  • PDF
Biomechanical characteristics and determinants of instep soccer kick.
  • E. Kellis, A. Katis
  • Computer Science, Medicine
  • Journal of sports science & medicine
  • 1 June 2007
We examine the biomechanics of soccer kick performance and identify weaknesses of present research which deserve further attention in the future. Expand
  • 213
  • 24
  • PDF
Effects of an intermittent exercise fatigue protocol on biomechanics of soccer kick performance
The purpose of this study was to examine the effects of fatigue on biomechanical indices of soccer kick performance. Ten male amateur soccer players performed maximal instep kicks prior to, in theExpand
  • 115
  • 13
Knee biomechanics of the support leg in soccer kicks from three angles of approach.
PURPOSE To examine knee joint kinematics, electromyographic (EMG) activity patterns and ground reaction forces (GRF) during an instep soccer kick from three different approaches relative to the ball.Expand
  • 92
  • 12
Reliability of EMG power-spectrum and amplitude of the semitendinosus and biceps femoris muscles during ramp isometric contractions.
  • E. Kellis, A. Katis
  • Mathematics, Medicine
  • Journal of electromyography and kinesiology…
  • 1 June 2008
Appropriate reliability is a necessary condition for the use of surface EMG for evaluation of hamstring muscle function in cases of knee joint pathologies or ligament injuries. The aim of the studyExpand
  • 36
  • 7
Three-dimensional kinematics and ground reaction forces during the instep and outstep soccer kicks in pubertal players
Abstract The purpose of the present study was to compare the three-dimensional kinematics of the lower extremities and ground reaction forces between the instep kick and the kick with the outsideExpand
  • 41
  • 5
Quantification of functional knee flexor to extensor moment ratio using isokinetics and electromyography.
CONTEXT Evaluating moment balance around the knee helps athletic trainers set appropriate targets for injury prevention and rehabilitation programs. OBJECTIVE To examine the knee flexor (KF) toExpand
  • 34
  • 5
The relationship between isokinetic knee extension and flexion strength with soccer kick kinematics: an electromyographic evaluation.
  • E. Kellis, A. Katis
  • Mathematics, Medicine
  • The Journal of sports medicine and physical…
  • 1 December 2007
AIM The purpose of this study was to investigate the relationship between isokinetic strength knee testing and soccer kick kinematics using electromyography (EMG). METHODS Thirteen pubertal soccerExpand
  • 33
  • 4
Age and gender differences in kinematics of powerful instep kicks in soccer
Soccer kicking training should be adjusted to the characteristics of the athletes. Therefore, examination of differences in kicking kinematics of females and pubertal players relative to males isExpand
  • 24
  • 3
Mechanisms that influence accuracy of the soccer kick.
Goal scoring represents the ultimate purpose of soccer and this is achieved when players perform accurate kicks. The purpose of the present study was to compare accurate and inaccurate soccer kicksExpand
  • 41
  • 3
  • PDF