Sitting forward flexion is to measure the possible range of motion of joints such as trunk, waist and hip, which mainly reflects the extensibility and elasticity of joints, ligaments and muscles in these parts and the development level of students' physical flexibility.

Test method: The subjects sat on the flat ground with their legs straight and their feet separated by about 10~ 15 cm. The upper body bends forward. Before straightening your arms, push the cursor forward gradually with the fingertips of both hands until it can't be pushed. The inner edge plane of the tester pedal longitudinal plate is 0, which is negative inward and positive forward. The recording unit is centimeters, with one decimal place reserved. Test twice and get the best result.