Mengning Xie.  Based on the Mathematical Multiple Linear Regression Equation and Research on the High Relationship between Explosive Power and Relative Snatch in Weightlifting.  Dynamic Systems and Applications 29 (2020) No. 3, 757-771

https://doi.org/10.46719/dsa202029328

ABSTRACT.
The German Isomed 2000 isokinetic strength tester was used to perform bilateral hip, knee, and ankle joints at 60°/s, 120° on 17 athletes (exercise group) and 18 first-class (level 1) male weightlifters. /s, 180°/s and 240°/s centripetal, centrifugal (5 times per angular velocity) test. Explore the characteristics of isokinetic muscle strength of lower limb joints of elite male weightlifters at different angular velocities, compare the difference between the athletes and the first-class group, perform Pearson correlation analysis on the relative peak torque and relative specific performance of the lower-extremity joints of the athletes, and establish grasping, jerk and peak torque Multiple linear regression equation. The results showed that the relative extension force of the hip joint of the outstanding male weightlifter was highly positively correlated with the relative snatch, and the moderate speed of the hip joint (120°/s), the relative extension force of the knee and ankle joints were moderately significantly positively correlated with the relative snatch, and The absolute flexion force of the ankle joint was moderately and significantly negatively correlated; the relative extension force of the hip joint was highly positively correlated with the relative jerk; the left knee (jerk stance leg) was relatively moderate (120°/s), explosive force, and relative to the ankle joint. There was a moderately significant positive correlation between explosive power and relative jerk.

Keywords: weightlifting; isokinetic muscle strength; peak torque; correlation analysis; regression analysis; exercise biomechanics.