Based On The Ratio Method To Improve The Effectiveness Of The Sitting Body Flexion Measurement

As an important means to measure the flexibility of the body, it is very important to the sit and reach test. At present, the traditional sit and reach test although to a certain extent reflects the subjects’ overall flexibility, but there are defects in the individual difference, according to the research shows that traditional body antexion measurement method is easily affected by the upper extremity length, leg length,sitting posture shoulder high, can not really reflect the individual flexibility and between individuals the difference. At the same time the improved measurement method still exist, that can completely overcome the impact of body shape on the measurement validity of the improved method, compared with the traditional body antexion, body antexion improved measurement while in a certain extent, improve the measurement validity, but the measurement and evaluation methods are still in length measure the angle index has not completely overcome the influence of the length of body shape index. The above body flexion angle calibration, the traditional sit and reach test measurement and evaluation based on using the method of literature,mathematical statistics, the ratio of construction method, physical measurement,measurement and evaluation method put forward and reach the ratio of seats, to eliminate all forms of physical index influence on measurement, validity and comparative analysis the traditional body antexion and the ratio of body antexion measurement methods, and provide a theoretical reference for the teachers and our young people’s physique monitoring scientific work. The conclusions are as follows:(1) reach the measurement and evaluation of the traditional sit and reach test although to a certain extent, reflects the subjects’ overall flexibility, but easy to be influenced by the upper extremity length, leg length, sitting posture shoulder high, can not really reflect the individual flexibility and individual differences.(2) showed no correlation between the ratio method of sit and reach test results and the height,sitting height,sitting shoulder leg,arm length,BMI,on the poor, showed that the morphological index (body height, sitting height, sitting shoulder leg, arm length, BMI, poor) does not affect the ratio of the seat body methods of measurement for flexion expression flexibility.(3) using the ratio method to measure the sitting posture in the affected factors and validity, are better than the traditional sit and reach test, more suitable for young people to reflect the flexibility.