Comparative Study on Lower Limb Reactive Force of Female Talent Sprinters in China

Objective: To study lower limb reactive force of female talent sprinters and feasibility of adding squat jump and 40 cm drop jump into sprint talent identification system. Methods: One hundred and twenty-five sprinters from National Olympic High Level Single Event Talent Bases voluntarily participated in this test. They were divided into two groups and three groups by the performance of 100 m and age, respectively. Squat jump and 40 cm drop jump were used to test lower limb reactive force of subjects. The kinetic and kinematic data were collected by three-dimensional force platform. Results: there were significant differences in squat jump vertical maximum force, flight height, maximum power as well as 40 cm drop jump flight height and momentum between different performance groups. Significant differences also existed among different age groups. Squat jump and 40 cm drop jump were significantly correlated with 100 m performance in several indicators. Conclusion: Subjects with higher level performance in 100 m have higher lower limb reactive force, but age is not consistent with lower limb reactive force level. Squat jump and 40 cm drop jump can be added into sprint talent identification system.