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The primary purpose of this study was to compare the hamstring-to-quadriceps strength(H/Q) ratios in collegiate soccer players and normal age-matched healthy students, and the secondary purpose was to investigate the changes in the H/Q ratio according to the degree of knee flexion. Twenty-five subjects volunteered to participate in this study. The study group comprised 12 healthy male collegiate soccer players, and the control group, 13 healthy age-matched male collegiate students. The modified N-K table was used for isometric strength measurement(unit: N). Mann-Whitney tests were performed to determine the differences in the H/Q ratios of soccer players and age-matched students at different knee flexion angles of the dominant leg. The strength of the hamstring muscle in the study group was significantly lower than that observed in the control group at knee flexion angles of 60° (p<.001), 90° (p<.01), and 120° (p<.05). The strength of the quadriceps muscle in the study group was significantly higher than that observed in the control group at flexion angles of 30° (p<.001) and 60° (p<.05). The H/Q ratios in the study and control groups differed significantly at all angles (60°, p<.001 90°, p<.001 and 120°, p<.001).