本研究的目的在於探討受過耐力訓練運動員之肌力與爆發力對5000公尺成績表現的影響。受試者為18位受過良好訓練之運動員，平均年齡20.43±1.47歲，身高173.2±4.37公分，體重65.85±5.63公斤。所有的受試者都要接受肌力與爆發力測試以及5000公尺跑步測試。首先，受試者先以Cybex 6000等速肌力測試機，求出其肌力與爆發力。再進行5000公尺跑步測試，並利用皮爾遜積差相關，求出5000公尺跑步成績與肌力、爆發力之相關。結果發現肌力與爆發力都與5000公尺跑步成績有顯著相關(r=-.512、-.689)，在修正體重相關因素的影響之後，肌力與爆發力與5000公尺跑步表現的相關性更高(r=-.596、-.751)。因此，在平時的耐力訓練之外，運動員應加強肌力與爆發力訓練，才能有較佳的成績表現。

The purpose of this study was to investigate the relationship between muscular fitness and 5000 m running performance. The subjects were eighteen healthy males with well endurance training, with the average age, height and weight of 20.43±1.47 years (mean ± SD), 173.3±5.5 cm and 66.8±5.3 kg respectively. All subjects underwent strength and power test. The strength and muscle power of each subject was measured by Cybex 6000 isokinetic machine. 5000 meter performance was performed on an outdoor 400 m track. The relationships between strength, muscle power and 5000 m running performance were evaluated using Pearson's product-moment correlation. As the result, strength and muscle revealed significantly correlated with 5000 m running performance (r=-.512, -.689), and after body weight correction, strength and muscle power were higher significantly correlated with 5000 m running performance (r= -.596, -.751). In conclusion, for better performance, endurance athletes are encouraged to include strength and muscle power conditioning in addition to daily endurance training.