主题：【原创】2007年中国足球的进步 -- 毛锥子

During the preseason period, players normally do fitness testing in order to determine each player’s physiological condition. From the results of the testing, the coaches can identify the strengths and weaknesses of the players and train them accordingly. Appropriate testing should be specific and reliable enough to reflect the actual status of the fitness of the soccer players. In this context, the features of the soccer game and related physiological testing will be discussed.

Aerobic fitness is dependent on and limited by the body’s ability to deliver oxygen to the working muscles. The heart, lungs, blood, circulatory system, and working muscles are factors in determining one’s aerobic fitness. Aerobic fitness is important as the soccer players have to cover the total distance around 10km, and 35.1% of the total player time in a game consists of low intensity running.

Estimation of Aerobic Capacity

VO2max can be determined from either maximal or submaximal exercise testing. At maximal exercise level, VO2max is measured directly from expired gases or estimated from exercise intensity. In the laboratory, VO2max can be estimated from treadmill and cycle ergometer performance and heart rate response to the exercise. Field tests can also be conducted to determine the aerobic capacity in football players Grant et al (1995) compared different field test results (Cooper's 12 minute run test, Multistage shuttle run test) with a maximal treadmill test. Results showed high correlations, with coefficients for the Cooper test and Multistage shuttle run test of 0.92 and 0.86 respectively. As football requires frequent change of direction during running, the Multistage shuttle run test may be a more specific test.