The Variation Characteristics Of Rowing Athletes' Heart Rate, Power And Surface Electromyography In Ergometry Test Of Full 2000m

Commonly used in rowing training monitoring heart rate, ergometer power, blood lactate concentration to monitor these indicators is a systemic reaction, changes in overall function, and can not be accurate, timely and effective response to the local body function rowers state, and blood lactate, difficult to monitor the process in motion and has some injury. Surface electromyography in the monitoring exercise training athletes in time reflect the state of local muscle training can be monitored in order to exert muscle, muscle contraction speed, muscle strength, muscle fiber type, the degree of muscle fatigue, and the monitoring process There is no injury. From the training reality, full of rowers 2000m Ergometer Test Center rates, variation of power and surface EMG study. The use of literature, experimental and mathematical analysis of statistical and other research methods rowers order to exert the muscles, muscle strength contribution to the local athletes from the whole body function to monitor the situation and explore analysis of integral EMG (iEMG) , mean power frequency (MPF), heart rate and power in the full dynamometer test changes in the 2000m feature. By analyzing the following conclusions:1 Test object in the full 2000m ergometer test, all test objects are basically the same trend in heart rate, heart rate increased gradually throughout the testing process, the rate of increase became smaller, and gradually into the relatively stable stage.2 All test subjects in the first 500m of the maximum power output, most of the third test object 500m minimum output power, high-level athletes can be seen is often used at home and abroad, "1-3" tactical mode, but the difference in power than segment great is its lack of high level athletes; the best performance throughout the test object in the most stable output power, the best scores; that all rowers in the game segment speed difference should not be too large.3 Surface EMG evaluation of visual diagram can be better athletes made the main force of the muscles to exert the state. Can explain to some extent: the major development effort and asynchronous synchronization of muscle of discharge phenomenon, the major development effort to exert muscle size, hair length of force duration, all the major muscle to exert force issued the order.4 Surface EMG analysis of energy contributions to the strength of rowers, of the total discharge should be integrated, discharge duration and peak discharge of the overall analysis. Analysts believe that the name of the test object is characterized by the contribution of muscle strength: the vastus medialis to provide greater power output and to exert a longer time; deltoid and biceps after the beam peak discharge and total discharge are large, but to exert short duration; erector spinae and latissimus dorsi muscle discharge was smaller, but the discharge of longer duration.5 Energy surface electromyography analysis of muscles forces rowers continued to force the sequence and time. Object of the timing characteristics of the test are basically the same force, the major development effort, begin to exert muscle force of the order of issuing shares of the medial muscle, erector spinae, latissimus dorsi, deltoid muscle after the beam, tibialis anterior, biceps. Major development effort to achieve the maximum force the muscle part of the order of the vastus medialis muscle, erector spinae, latissimus dorsi, deltoid muscle after the beam, biceps, tibialis anterior muscle. The test subjects the duration of muscle to exert force in accordance with the order of the muscles gradually reduced during the development effort of the block rate of force development effort muscle strength by the order of the muscles gradually accelerated.6 Individual test subjects found in the full value of the average IEMG increased with time series, the output power is more stable; most test subjects in the full value of the average IEMG decrease with time series or remained unchanged, the output power decreased. Most of the test objects of different muscle IEMG value in the trends in the test is inconsistent throughout, indicating that the contribution of players of each muscle in a certain change in the entire process.7 Study found that test subjects made all the major muscle strength mean power frequency (MPF) in little change throughout the test, most test subjects made all the major muscles of the MPF force decreased slightly or remain unchanged, the main test object made of individual muscle force MPF slightly upward trend. Most athletes throughout the test, the discharge of short duration deltoid biceps after the MPF beam and the rise or remain unchanged, the discharge of shares of longer duration and the erector spinae muscles inside the MPF decreased or unchanged.8 2000m test in the full test object corresponding to the instantaneous power and IEMG values are in good agreement, while the heart rate is increased, the mean power frequency changed little. Test object increased heart rate, the total integrated EMG muscle increases, the average power increases the frequency of high power output can be maintained or increased body power output.