Monitoring And Analysis Of Partial Biochemical Indexes In The Preparations Of Hubei Canoe And Kayak Team During The12^th National Games

Objective:to research and explore the effectiveness of partial biochemical indicators, the correlation among feasibility, index and training, and the correlation between indexes through evaluating the physical function of the athletes in provincial-level canoe and kayak team during their preparative training for China’s major sports events for the purpose of providing basis for canoeing and kayaking training and monitoring.Objects and methods:the research objects were the12male athletes of Hubei Canoe and kayak Team, including7male kayak members and5canoe members. The whole monitoring was constituted by two stages, including Summer training and Winter training. The former lasted18weeks from17th April2012to20th August2013, and the latter also lasted18weeks from12th November2012to19th March2013. In the training period, the hemoglobin, blood urea nitrogen, creatine kinase of athletes were tested during6:30and7:30in every Monday morning. In Winter training, intensive and short-distance anaerobic training was implemented from the9th to14th weeks. At that time, the instant blood lactic acid values of the athletes were figured out through250m dynamometer test of second-level incremental load, with the first-level load reaching80%of the strongest intensity and the secondary load reaching100%of strongest intensity. Four indexes were used to monitor the physical function of the athletes in training period, and the independent-samples T test in statistical methods used to explore the difference between Summer training and Winter training. The repeated measures were applied to analyzing indexes’effectiveness on training monitoring; the pared samples T test to testing the effect of exercise training; and correlation analysis to research the correlation between indexes.Results:1. According to the analysis on the difference in conventional biochemical index between Summer and Winter trainings, there is an insignificant difference between the average hemoglobin values of kayak members (P>0.05) but significant difference between those of canoe members{P<0.05; the average value in Winter training (156.4±8.3g/L) was far greater than that in Summer training (148.8±7.7g/L)}; there is an insignificant difference between the average values of blood urea nitrogen of canoe and kayak members (P>0.05); there is an insignificant difference between the average values of creatine kinase of canoe members (P>0.05) but significant difference between those of kayak members{P<0.05; the average value in Winter training (294.3±86.0U/L) was far greater than that in Summer training (211.6±87.1U/L)}2. As shown by the overall analysis on the changes of conventional biochemical indexes during Summer and Winter trainings of male canoeing, the coaches arranged the training reasonably and scientifically through the monitoring and timely adjustment of athletes’ three blood sample indexes.3After six-week intensive anaerobic training, the athletes achieved better performance under the first-level load in250m second-level incremental load test compared with the previous test (P<0.05:the average values of the performance and the power of previous test were63.1±2.0s, and those of the later test were161.8±2.9s). Under second-level load, blood lactic acid was significantly higher than that of last six-week (P<0.05:the average values of lactic acid in previous and later tests were7.5±1.6mmol/L and8.4±1.4mmol/L, respectively).4According to the analysis on the correction between blood lactic acid and other indexes after second-level incremental load exercise, the power was significantly and negatively correlated with the performance (the correlation coefficients under the first-level and second-level loads were-0.485and-0.623, respectively); that is, the better the performance was, the greater amount of the lactic acid would be, and meanwhile, the correlation between blood lactic acid and the performance increased with intensity.Conclusions:1. It is necessary to establish different evaluation standards for the average hemoglobin values of kayak members between Summer and Winter trainings, because there were significantly different from each other, and meanwhile, the average values of creatine kinase of canoe members between Summer and Winter trainings should be treated differently, since they also significantly different from each other as well. There was an insignificant difference in the average values of the blood urea of canoe and kayak members between Summer and Winter trainings. This suggests that compared with hemoglobin and creatine kinase, blood urea is more stable and more resistant to the disturbance of external factors, and thus can be applied to evaluating the change of intensity and amount in the whole year.2. During Summer and Winter trainings, hemoglobin, blood urea and creatine kinase experienced a periodical changes due to the difference in training cycle and methods:the value of blood urea significantly changed with the amount of exercise; along with the change of exercise intensity, creatine kinase also witnessed a significant change in value; most of the time, hemoglobin changed with both the amount of exercise and exercise intensity. Hemoglobin, blood urea and creatine kinase faced individual differences to varying degrees. The horizontally and vertically comprehensive comparison about hemoglobin, blood urea and creatine kinase is of greater significance to the monitoring of canoeing training, and single index cannot be deemed as the standard for raising amount of exercise and exercise intensity.3. From the9th to14th weeks in Winter training, the intensive and short-distance anaerobic training arranged by the coach for the athletes has produced obvious effects. After six-week training, the athletes have significantly improved their performance under the first-level load as well as the blood lactic acid under the second-level load. In the250m kayaking sport, the lactic acid increased with intensity. According to the analysis of correlation coefficients, lactic acid and performance faced a linear increase along with intensity, and in anaerobic exercise, there was a great correlation between the lactic acid and the performance of the athletes. Therefore, the instant blood lactic acid value after athletes’anaerobic exercise can be used to judge athletes’anaerobic capacities and then infer their competition results.