This present study investigated the effects of goal setting methods on sit up performance in elementary school children. Subjects Were 80 pupils from the five grade in elementary school. they were randomly assigned to four conditions : specific goal setting(individual), specific goal-setting(group), nonspecific goal setting(individual), nonspecific goal-setting(group), they practiceed sit-up in class three time a week for weeks according to the experimental treatments. Two way ANOVA indicated that goal setting methods were appeared sigbigicant differences (p <0.05). In the camparison between these two groups, specific goal-stting group was higher than nonspecific goal-setting group in sit-up performance. A review of both laboratory and field studies of the effects of goals setting when performing a task that 90% of th studies specific and challenging goals lead to higer performance than non-specific goals. Goal setting is likely to improve Endurance performance when the goals are specific and sufficiently challenging.