Significant difference in BLA decreasing speed were showed after swimming of three different distance, forming single peak and double peak BLA decreasing curve, suggesting load and sustaining time etc.

• 不同距离负荷后血乳酸下降速率差异明显，形成单峰型和双峰型的血乳酸下降曲线，说明三种距离负荷强度、持续时间等时间等负荷特征影响机体内乳酸平衡状态；