Objects: Energetic profile of 500m kayak sprint was researched. Methods: Eight junior female kayakers (15±1 yr, 172±4 cm, 65±5 kg, 15±10 month of training experience) volunteered to participate in this research and paddled on a Dansprint kayak ergometer for a step test and a 120s all-out test. Using information from ergometer and spirometric analyzer, the energetic con-tribution was measured with accumulated oxygen deficit (AOD) method. Results: The energy of 500m kayak sprint was supplied with 59.6±11.4% from aerobic system. The maximal heart rate and blood lactate acid during the 500m paddling were 179±8 bpm, and 11.3±1.5 mM/L, respectively. The energy of the first 5 to 10 seconds (s) in 500m paddling was provided primarily by an-aerobic alactic system. The anaerobic lactic system played an important role from the 10th to 40th s. After 40s paddling, the aerobic system dominated the energy supply. Conclusion: Kayak sprint 500m is an aerobic-dominated sport event. There is an underestimation on the aerobic contribution. The energetic profile of energy supply in 500m kayak sprint could provide a better biological background for the training.
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