output publications or other works Different levels of variability versus specificity of practice applied to increase the performance under statics task constraints Conference Poster Effect of training frequency on abdominal muscle endurance Conference Poster Flexo-rotation trunk test validity for measuring abdominal muscle fatigue Conference Poster RELATIONSHIP BETWEEN IMPLICIT ABILITY BELIEFS, PERCEIVED COMPETENCE AND AMOTIVATION: A STUDY BY VALLERAND'S HIERARCHICAL MODEL Conference Poster THROWING VARIABILITY AND ACCURACY UNDER INSTABILITY CONDITIONS IN YOUNG TEAM-HANDBALL PLAYERS. Conference Poster Trunk muscular response during 'bridge' stabilization exercises with and without limb motion Conference Poster