The aim of this study was to analyze the influence of certain task constraints, on the learning of defensive handball skills. By applying the observational methodology and through the use of an ad hoc observation instrument, the behaviors performed by 14 players (M=14,6) were registered over six sessions, while they played 18 games in a small-sided game situation using both teams an individual system defense. Matches were played under the influence of three task constraints and to study their influence on the behavior of the players, it was used the polar coordinate technique. It was found that the prohibition of the bound facilitates the defense of clearing out, whereas the obligation of getting and passing the ball in movement enables the defense of faints, as well as, the realization of steals, helps and follows to another player. These results can help coaches optimize their training programs.