The purpose of this study is to compare the differences in cable force between throws with a competition hammer (7.26 kg) and a heavier hammer (8.0 kg). Sixteen male hammer throwers threw the competition and heavier hammers, and three-dimensional motion analyses were conducted. The maximum cable force of the heavier hammer was significantly higher than that of the competition hammer during the double support phase of the 3rd and 4th revolutions. This indicates that throws with the heavier hammer cause a load increase during a particularly important phase of the hammer head`s acceleration. This suggests that throws with a heavier hammer can be an effective training method for improving specific strengths to accelerate of the hammer`s head.
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