To compare the effectiveness of three learning styles in physical education, a sample of 120 male sixth graders was randomly selected using cluster sampling method and then randomly assigned to three experimental groups differing in learning style. All students were tested on physical fitness including running endurance, muscle flexibility, and cardio-vascular strength, and then participated in 20 training sessions learning and doing exercises aimed at improving the tested qualities. The results of post-test comparisons revealed that the group using the cooperative style of learning was superior in terms of the observed improvement.