(1.Department of Physical Education,Xiangnan University,Chenzhou 423000,China;2.College of Physical Education,South China Normal University,Guangzhou 510631,China) Abstract: In order to gain an insight into the characteristics and affecting factors of energy supply in the Sanda event, the authors used 26 class one and class elite Sanda athletes as the experimental subjects (ESs), and 42 class one athletes for such 6 events as 100-1,500 m runs as the controls, measured and analyzed such indexes as coeffi-cient of urine creatinine, gaseous (energy) metabolism, blood lactic acid concentration after the game, individual lactic acid threshold, as well as average fighting time per fight and non-fighting time per break in Sanda competi-tion, and revealed the following findings: the total fighting time in each round is 28.6% of the game time in each round, while the total break (non-fighting) time is 71.4% of the game time in each round; the total oxygen consump-tion for the fighting periods in 3 rounds is 8.338 L, while the total oxygen over consumption after the game is 46.162 L; these two consumptions are respectively 15.3% and 84.7% of their sum, which means that the oxygen deficit is too large; at peace, there is no significant difference between the coefficient of urine creatinine of the ESs and that of the athletes for 100 m and 200 m runs ((38.8±7.9) mg/kg vs.(39.7±8.5) mg/kg vs (39.5±8.2) mg/kg,P>0.05); the blood lactic acid concentration of the ESs immediately after each round of competition is significantly lower than that of the athletes for 400m and 800 runs; there is no significant difference between the individual lactic acid threshold of the ESs and that of the athletes for 200 m and 1 000 m runs (P>0.05); there is a significant differ-ence between the maximum glycolysis capacity of the ESs and that of the athletes for 400 m and 800 m runs (14.53±2.31 vs. 16.82±1.49 vs. 16.65±2.23,P<0.05).This study reveals that Sanda is a fast moving fighting event in which the energy is supplied primarily by the phosphagen system and secondarily by the lactic acid energy system. It is suggested that only by fully understanding the characteristics of energy supply for and the causes for the occur-rence of fatigue of the body of Sanda athletes can the basic physical constitution of the athletes be action specifi-cally improved in order to achieve an excellent performance. Key words: athletic physiology;Sanda;urine creatinine;lactic acid threshold;oxygen over consumption after the game |