<![CDATA[This study aims to determine the effect of the dumbbell arm swing exercise on forehand stroke speed in tennis. The research method used was an experimental method with a pretest-posttest control group design. The study sample consisted of 20 students divided into two groups: an experimental group of 10 students who underwent dumbbell arm swing training, and a control group of 10 students who participated in regular training. The instrument used in this study was a forehand stroke speed test using a radar speed gun. Data analysis was performed using the Wilcoxon test to determine differences in pretest and posttest scores within each group, and the Mann–Whitney U test to determine differences in score gains between the two groups. The results of the study showed that the experimental group experienced a significant increase in forehand stroke speed after undergoing dumbbell arm swing training, with a significance value of 0.005 (p < 0.05). Meanwhile, the control group did not show a significant improvement, with a significance value of 0.105 (p > 0.05). The results of the Mann–Whitney U test on the gain scores showed an Asymp. Sig. (2-tailed) value of 0.000 (p < 0.05), indicating a significant difference in improvement between the experimental group and the control group. Keywords: Dumbbell Arm Swing, Forehand Stroke Speed, Weight Training, Sports, Tennis]]>
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