A KINEMATIC ANALYSIS OF THE STICKING REGION IN FULL BACK SQUATS

Abstract

The purpose of this study was to investigate 3D kinematics around the sticking region (the weakest region) in full back squats. Eleven resistance-training males (age 23.5 ± 2.6 years, body mass 86.8 ± 21 kg, body height 1.81 ± 0.08 m) performed 6-RM full back squats and the last repetition was taken for further analyses of 3D kinematics around the sticking region. The main findings were that all participants exhibited a sticking region during the last repetition of 6-RM squatting. Timing of the peak and minimal angular velocities of the hip extension, knee extension and plantar flexion movements were concomitant with the two peak velocities and minimal velocity of the barbell. It was suggested that timing and activity (power output) between the knee and hip extensors are responsible for the existence of the sticking region.