• 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
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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
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Determining Variables of Plyometric Training for Improving Vertical Jump Height Performance: A Meta-Analysis
Saez Saez de Villarreal, E, Kellis, E, Kraemer, WJ, and Izquierdo, M. Determining variables of plyometric training for improving vertical jump height performance: a meta-analysis. J Strength Cond ResExpand
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Muscle co-activation around the knee in drop jumping using the co-contraction index.
The purpose of this study was to examine the co-activation of the rectus femoris (RF) and biceps femoris (BF) during drop jumping exercises using the co-contraction index (CI). Ten trained male longExpand
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Effects of two 4-week proprioceptive neuromuscular facilitation programs on muscle endurance, flexibility, and functional performance in women with chronic low back pain.
BACKGROUND AND PURPOSE Improving functional performance in patients with chronic low back pain is of primary importance. The purpose of this study was to examine the effects of 2 proprioceptiveExpand
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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
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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
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Vertical Jump Biomechanics after Plyometric, Weight Lifting, and Combined (Weight Lifting + Plyometric) Training
Arabatzi, F, Kellis, E, and Saèz-Saez de Villarreal, E. Vertical jump biomechanics after plyometric, weight lifting, and combined (weight lifting + plyometric) training. J Strength Cond Res 24(9):Expand
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Ankle Sprain Injuries and Risk Factors in Amateur Soccer Players during a 2-Year Period
Background Although ankle sprains are common in soccer, the role of various risk factors in amateur soccer players is unclear. Purpose To identify the incidence of ankle sprain injuries, associatedExpand
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Quantification of Quadriceps and Hamstring Antagonist Activity
SummaryThe coactivation of hamstrings and quadriceps, and its relation to knee joint stability and cruciate ligament loading, have been extensively examined over the last decades. The purpose of thisExpand
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