求翻译：开始时，我觉得很累，跑得太远了，有时跑不动，想哭。经过一段时间的锻炼，我渐渐觉得不累了，还能够跑得很快。爸爸说：“跑步贵在坚持，即可以锻炼身体，还可以磨炼意志。”是什么意思？

At the beginning, I felt very tired, went too far, sometimes running fixed, like crying. After a period of training, I began to feel tired, you can also run very fast. Dad said: "running your stick, to exercise, you can also add character. ”